Novembro 25, 2014

Bateson - Mind & Nature (1979)

[N]othing has meaning except it be seen as in some context. [...] Without context, words and actions have no meaning at all. [...] It is the context that fixes the meaning. (p.14ff)

There is a parallel confusion in the teaching of language that has never been straightened out. Professional linguists nowadays may know what's what, but children in school are still taught nonsense. They are told that a "noun" is the "name of a person, place, or thing," that a "verb" is "an action word," and so on. That is, they are taught at a tender age that the way to define something is by what it supposedly is in itself not by its relation to other things. Most of us can remember being told that a noun is "the name of a person, place, or thing." And we can remember the utter boredom of parsing or analyzing sentences. Today all that should be changed. Children could be told that a noun is a word having a certain relationship to a predicate. A verb has a certain relation to a noun, its subject. And so on. Relationship could be used as basis for definition, and any child could then see that there is something wrong with the sentence " 'Go' is a verb." (p.17)

Science sometimes improves hypotheses and sometimes disproves them. But proof would be another matter and perhaps never occurs except in the realms of totally abstract tautology. We can sometimes say that if such and such abstract suppositions or postulates are given, then such and such must follow absolutely. But the truth about what can be perceived or arrived at by induction from perception is something else again.

Let us say that truth would mean a precise correspondence between our description and what we describe or between our total network of abstractions and deductions and some total understanding of the outside world . Truth in this sense is not obtainable. And even if we ignore the barriers of coding , the circumstance that our description will be in words or figures or pictures but that what we describe is going to be in flesh and blood and action-even disregarding that hurdle of translation, we shall never be able to claim final knowledge of anything whatsoever. (p.27)

Knowledge at any given moment will be a function of the thresholds of our available means of perception. The invention of the microscope or the telescope or of means of measuring time to the fraction of nanosecond or weighing quantities of matter to millionths of a gram all such improved devices of perception will disclose what was utterly unpredictable from the levels of perception that we could achieve before that discovery. [...] Science probes; it does not prove (p.29)

All experience is subjective. (p.31)

The division of the perceived Universe into parts and wholes is convenient and may be necessary but no necessity determines how it shall be done [...] Explanation must always grow out of description, but the description from which it grows will always necessarily contain arbitrary characteristics. (p.38)

If I throw a stone at a glass window, I shall, under appropriate circumstances, break or crack the glass in a star-shaped pattern. If my stone hits the glass as fast as a bullet, it is possible that it will detach from the glass a neat conical plug called a cone of percussion. If my stone is too slow and too small, I may fail to break the glass at all. Prediction and control will be quite possible at this level. I can easily make sure which of three results (the star, the percussion cone, or no breakage) I shall achieve, provided I avoid marginal strengths of throw.

But within the conditions which produce the star-shaped break, it will be impossible to predict or control the pathways and the positions of the arms of the star. 

Curiously enough , the more precise my laboratory methods, the more unpredictable the events will become. If I use the most homogeneous glass available, polish its surface to the most exact optical flatness, and control the motion of my stone as precisely as possible, ensuring an almost precisely vertical impact on the surface of the glass, all my efforts will only make the events more impossible to predict.

If, on the other hand, I scratch the surface of the glass or use a piece of glass that is already cracked (which would be cheating), I shall be able to make some approximate predictions. For some reason (unknown to me), the break in the glass will run parallel to the scratch and about 1/100 of an inch to the side, so that the scratch mark will appear on only one side of the break. Beyond the end of the scratch, the break will veer off unpredictably.

Under tension, a chain will break at its weakest link. That much is predictable. What is difficult is to identify the weakest link before it breaks. The generic we can know, but the specific eludes us. Some chains are designed to break at a certain tension and at a certain link. But a good chain is homogeneous, and no prediction is possible. And because we cannot know which link is weakest, we cannot know precisely how much tension will be needed to break the chain. (p.41)

[G]radual growth in a population, whether of automobiles or of people, has no perceptible effect upon a transportation system until suddenly the threshold of tolerance is passed and the traffic jams. The changing of one variable exposes a critical value of the other.

A pure description would include all the facts (i.e., all the effective differences) immanent in the phenomena to be described but would indicate no kind of connection among these phenomena that might make them more understandable. For example, a film with sound and perhaps recordings of smell and other sense data might constitute a complete or sufficient description of what happened in front of a battery of cameras at a certain time. But that film will do little to connect the events shown on the screen one with another and will not by itself furnish any explanation. On the other hand, an explanation can be total without being descriptive. "God made everything there is" is totally explanatory but does not tell you anything about any of the things or their relations.

In science, these two types of organization of data (description and explanation) are connected by what is technically called tautology. Examples of tautology range from the simplest case, the assertion that "If P is true, then P is true," to such elaborate structures as the geometry of Euclid, where "If the axioms and postulates are true, then Pythagoras' theorem is true. " Another example would be the axioms, definitions, postulates, and theorems of Von Neumann's Theory of Games. In such an aggregate of postulates and axioms and theorems, it is of course not claimed that any of the axioms or theorems is in any sense "true" independently or true in the outside world.

Indeed , Von Neumann, in his famous book, expressly points out the differences between his tautological world and the more complex world of human relations . All that is claimed is that if the axioms be such and such and the postulates such and such, then the theorems will be so and so. In other words , all that the tautology affords is connections between propositions. The creator of the tautology stakes his reputation on the validity of these connections. 

Tautology contains no information whatsoever, and explanation (the mapping of description onto tautology) contains only the information that was present in the description. The "mapping" asserts implicitly that the links which hold the tautology together correspond to relations which obtain in the description. Description, on the other hand, contains information but no logic and no explanation. For some reason, human beings enormously value this combining of ways of organizing information or material. [...] An explanation has to provide something more than a description provides and , in the end , an explanation appeals to a tautology.

Now, an explanation is a mapping of the pieces of a description onto a tautology, and an explanation becomes acceptable to the degree that you are willing and able to accept the links of the tautology. If the links are "self-evident" (i.e., if they seem undoubtable to the self that is you), then the explanation built on that tautology is satisfactory to you. (p.81ff)

Information consists of differences that make a difference. If I call attention to the difference between the chalk and a piece of cheese, you will be affected by that difference, perhaps avoiding the eating of the chalk, perhaps tasting it to verify my claim. Its noncheese nature has become an effective difference. But a million other differences-positive and negative, internal and external to the chalk remain latent and ineffective.

Bishop Berkeley was right, at least in asserting that what happens in the forest is meaningless if he is not there to be affected by it.

We are discussing a world of meaning, a world some of whose details and differences, big and small, in some parts of that world, get represented in relations between other parts of that total world . A change in my neurons or in yours must represent that change in the forest, that falling of that tree. But not the physical event, only the idea of the physical event. And the idea has no location in space or time---Only perhaps in an idea of space or time. (p.99)

Novembro 20, 2014

The Ethical Method

"[...] it’s remarkably common these days for people to insist that their values are objective truths, and values that differ from theirs objective falsehoods. That’s a very appealing sort of nonsense, but it’s still nonsense. Consider the claim often made by such people that if values are subjective, that would make all values, no matter how repugnant, equal to one another. Equal in what sense? Why, equal in value—and of course there the entire claim falls to pieces, because “equal in value” invites the question already noted, “according to whose values?” If a given set of values is repugnant to you, then pointing out that someone else thinks differently about those values doesn’t make them less repugnant to you. All it means is that if you want to talk other people into sharing those values, you have to offer good reasons, and not simply insist at the top of your lungs that you’re right and they’re wrong.

To say that values depend on the properties of perceiving subjects rather than perceived objects does not mean that values are wholly arbitrary, after all. It’s possible to compare different values to one another, and to decide that one set of values is better than another. In point of fact, people do this all the time, just as they compare different claims of fact to one another and decide that one is more accurate than another. The scientific method itself is simply a relatively rigorous way to handle this latter task: if fact X is true, then fact Y would also be true; is it? In the same way, though contemporary industrial culture tends to pay far too little attention to this, there’s an ethical method that works along the same lines: if value X is good, then value Y would also be good; is it? Again, we do this sort of thing all the time.

Consider, for example, why it is that most people nowadays reject the racist claim that some arbitrarily defined assortment of ethnicities — say, "the white race" — is superior to all others, and ought to have rights and privileges that are denied to everyone else. One reason why such claims are rejected is that they conflict with other values, such as fairness and justice, that most people consider to be important; another is that the history of racial intolerance shows that people who hold the values associated with racism are much more likely than others to engage in activities, such as herding their neighbors into concentration camps, which most people find morally repugnant. That’s the ethical method in practice." - John Michael Greer

Novembro 18, 2014

Walter Kaufmann - The Faith of a Heretic

Kierkegaard saw that reason and philosophy were unable to tell him what idea he should choose to live and die by. Hence, he despised philosophy and reason. What he, like millions of others, overlooked is a very simple but important point: reason and philosophy may well safeguard a man against ideas for which he might better not live or die. Indeed, if reason and philosophy had no other function whatsoever, this alone would make them overwhelmingly important. (p.87)

[Theologians] resemble lawyers in two ways. In the first place, they accept books and tradition as data that it is not up to them to criticize. They can only hope to make the best of these books and traditions by selecting the most propitious passages and precedents; and where the law seems to them harsh, inhuman, or dated, all they can do is have recourse to exegesis. Secondly, many theologians accept the morality that in many countries governs the conduct of the counsel for the defense. Ingenuity and skillful appeals to the emotions are considered perfectly legitimate; so are attempts to ignore all inconvenient evidence, as long as one can get away with it, and the refusal to engage in inquiries that are at all likely to discredit the predetermined conclusion: that the client is innocent. If all else fails, one tries to saddle one's opponent with the burden of disproof; and as a last resort one is content with a reasonable doubt that after all the doctrines that one has defended might be true. (p.126)

The attempt to solve the problem of suffering by postulating original sin depends on the belief that cruelty is justified when it is retributive; indeed, that morality demands retribution. (p.172)

The crucial point that should never be forgotten in the history of ideas can be put into a single sentence: one may have been influenced profoundly by others and yet be strikingly original and even revolutionary. (p.183)

In India, the Jina and Buddha, founders of two new religions in the sixth century BC, came to be worshiped later by their followers. In China, Confucius and Lao-tze came to be deified. To the non-Christian, Jesus seems to represent a parallel case. In Egypt, the Pharaoh was considered divine. In Israel, no man was ever worshiped or accorded even semi-divine status. This is one of the most extraordinary facts about the religion of the Old Testament and by far the most important reason for the Jew's refusal to accept Christianity and the New Testament. [...] Why, then, was Moses never defied or worshiped? The most obvious explanation is that he himself impressed his people with the firm idea that no human being is divine in any sense in which the rest of mankind isn't. (p.220)

According to the Gospels, Jesus' conception of salvation was radically otherworldly [...] The perspective of the prophets was reversed. They, too, had taught humility and love, but not this preoccupation with oneself. The accent had been on the neighbor and the stranger, the orphan, the widow, and the poor. Social injustice cried out to be rectified and was no less real because it meant a lack of love and a corruption of the heart. Man was told to love others and to treat them justly -- for their sake, not of his own, to escape damnation. To the Jesus of the Gospels, social injustice as such is of no concern. Heaven and hell-fire have been moved into the center. (p.221)

Consider the rich man who, according to Luke (18:18ff), asked Jesus the identical question [How to inherit eternal life?]. To him, Jesus cites five of the Ten Commandments before adding: "One thing you still lack. Sell all you have and distribute it to the poor, and you will have treasure in heaven; and come, and follow me." It is no longer the poor that require love and justice; it is the giver who is to accumulate treasure in heaven. The social order, with which Moses and the prophets were centrally concerned, counts for nothing; the life to come is everything. If what truly matters is treasure in heaven, what do the poor gain from what they are given? (p.222)

The Pharisees had tried to build what they themselves called "a fence around the Law" -- for example, by demanding that the observation of the Sabbath should begin a little before sunset, to guard against trespasses. It might seem that Jesus, in the sermon of the Mount, was similarly erecting a fence around morality. For he introduces his most extreme demands: "Till heaven and earth pass away, not a iota, not a dot, will pass from the law until all is accomplished. Whoever then relaxes one of the least of these commandments and teaches men so, shall be called least in the kingdom of heaven... Unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven." Then Jesus goes on to say that it is not enough not to kill: "Whoever says, 'You fool!' shall be liable to hell fire." It is not sufficient not to commit adultery, nor not to covet one's neighbor's wife, but "every one who looks at a woman lustfully has already committed adultery with her in his heart". On reflection, the old morality is not protected but undermined, not extended but dissolved; and no new morality is put in its place. Where murder is not considered importantly different from calling a man a fool, nor adultery from a lustful look, the very basis of morality is denied: the crucial distinction between impulse and action. If one is unfortunate enough to have the impulse, no reason is left for not acting on it. (p.226)

[...] we confront the objection that faith and morals are quite different [...] men of different faiths can live together in peace, provided they agree on standards of behavior; but without moral agreement men cannot live together in peace. This objection is half-true but quite insufficient to establish any absolute morality. Where there is much traffic, there have to be traffic rules to avoid needless injuries and deaths and to ensure the attainment of the purposes of traffic. There has to be an agreement on what side of the road one is supposed to drive. It does not matter whether the rule is to drive on the right or on the left; what matters is that everybody should follow the same rule. [...] it would be silly to insist that driving on the right is absolutely preferable, true or moral, while driving on the left is absolutely false and immoral. To live together peacefully, men need rules, and these rules may even have to be enforced, if all else fails, with penalties. It does not follow that these rules are absolutely right or that every act that conflicts with a rule, even if the rule should be important, is immoral in some absolute sense, unless, of course, we define immorality as violations of mores, of conventions -- as non-conformity. (p.311)

Most discussions of morality rest on the false assumption that 'moral' have one single central meaning. [...] Agreement that stealing is immoral may be comparable to a case in which five men refuse to eat beef and warn others not to eat it either: the first does not like the taste and either does not believe that taste differ or, admitting that they do, considers his own taste the only 'true' one. The second one loves the taste but wants to punish himself; and he too thinks that what is right for him is right for others. The third thinks that meat is poisonous or dangerous. The fourth is a Hindu. The fifth, who is not a Hindu, is a vegetarian. Their superficial agreement is not altogether unimportant. As long as they do not enter into questions of meaning, faith, or morals, they may get along; and they may even suppose erroneously that they agree on certain facts -- absolutely true facts -- which moral idiots who eat beef deny. (p.313)

Some people think moral disagreements are like disagreements about facts; others claim they are like differences of taste. Actually, moral judgments are almost invariably elliptical [ie, they miss relevant information], and when they are spelled out they are found to involve all kinds of assumptions about facts as well as an element of taste. And moral disagreements generally involve disagreements about facts, differences in taste, or both. Spelling out the factual disagreements may at times dispel a moral disagreement; but even when it does not, it will generally lead to a drastic reduction of heat. (p.315)

An ethic cannot be proved; to be held responsibly, it has to be based on encounter upon encounter. This notion of encounter is of the most philosophic importance. It makes possible safe passage between the untenable claim of proof and the unwarranted charge of irrationality. A position may be rational through it cannot be deduced from universally accepted premises, and a man may be rational without claiming that his views, his ethic, or his faith are susceptible of such proof. The pose of Socrates, always willing to subject any view to objections, was that of the rational man par excellence. (p.333)

Negative thinking is what save us from relativism. One has to show why alternatives are untenable. (p.334)

A man who does not consider how his actions are likely to affect other people is to that extent irresponsible, even if he acts on 'principle'. Moral judgments on specific actions are also irresponsible insofar as they are passed in ignorance of the background, the interests involved, and the probable consequences -- even if such judgments appeal to 'principle'. The principles themselves may be held in a more or less informed, responsible, rational manner. To be responsible and rational in such matters, one must consider what can be said against one's moral principles and standards. The man who gives no thought to objections and alternatives is, to that extent, irrational. (p.335)

Novembro 13, 2014

Cobardia

De todos os métodos filosóficos, a comparação é o mais fidedigno. Comparar gestos, atitudes, comparar a viabilidade e o benefício, a linguagem e a coerência. Há quem diga que é impossível comparar, que uma situação é sempre incomparável. Parece-me uma subtileza que esconde uma cobardia. Pedro Mexia

Novembro 10, 2014

Truth had never been a priority

All those gut feelings, right or wrong, that had kept the breed alive on the Pleistocene savannah—and they were wrong, so much of the time. False negatives, false positives, the moral algebra of fat men pushed in front of onrushing trolleys. The strident emotional belief that children made you happy, even when all the data pointed to misery. The high-amplitude fear of sharks and dark-skinned snipers who would never kill you; indifference to all the toxins and pesticides that could. The mind was so rotten with misrepresentation that in some cases it literally had to be damaged before it could make a truly rational decision—and should some brain-lesioned mother abandon her baby in a burning house in order to save two strangers from the same fire, the rest of the world would be more likely to call her a monster than laud the rationality of her lifeboat ethics. Hell, rationality itself—the exalted Human ability to reason—hadn’t evolved in the pursuit of truth but simply to win arguments, to gain control: to bend others, by means logical or sophistic, to your will. Truth had never been a priority. If believing a lie kept the genes proliferating, the system would believe that lie with all its heart. Peter Watts - Echopraxia

Novembro 06, 2014

Invisible Tigers

[...] fifty thousand years ago there were these three guys spread out across the plain, and they each heard something rustling in the grass. The first one thought it was a tiger, and he ran like hell, and it was a tiger but the guy got away. The second one thought the rustling was a tiger, and he ran like hell, but it was only the wind and his friends all laughed at him for being such a chickenshit. But the third guy, he thought it was only the wind, so he shrugged it off and a tiger had him for dinner. And the same thing happened a million times across ten thousand generations — and after a while everyone was seeing tigers in the grass even when there weren’t any tigers, because even chickenshits have more kids than corpses do. And from those humble beginnings we learned to see faces in the clouds and portents in the stars, to see agency in randomness, because natural selection favors the paranoid. Even here in the twenty-first century you can make people more honest just by scribbling a pair of eyes on the wall with a Sharpie. Even now, we are wired to believe that unseen things are watching us. 

 And it came to pass that certain people figured out how to use that. They painted their faces or they wore funny hats, they shook their rattles and waved their crosses and they said, Yes, there are tigers in the grass, there are faces in the sky, and they will be very angry if you do not obey their commandments. You must make offerings to appease them, you must bring grain and gold and altar boys for our delectation or they will strike you down and send you to the Awful Place. And people believed them by the billions, because after all, they could see the invisible tigers. Peter Watts - Echopraxia

Novembro 03, 2014

"Justiça Fiscal", JL Saldanha Sanches

Constitucionalizar um princípio é a forma contemporânea de tentar sacralizar e eternizar um valor considerado imperecível. Claro que já não é possível, e está longe dos diagramas de força que regem as sociedades actuais, a possibilidade de produzir uma nova versão dos Dez Mandamentos bíblicos, mesmo para fins a que hoje chamaríamos estritamente laicos. Não quer isto dizer que uma Constituição, tal como sucede com as nossas, não deva ter uma durabilidade mínima, pois a flexibilidade patológica constitui um forte elemento de deslegitimação.

A defesa dos direitos fundamentais, se for feita por meio de regras sujeitas a permanentes alterações, equivale a uma espécie de baluarte móvel, ou seja, uma contradição dos seus termos na defesa das garantias do sujeito passivo no Estado constitucional. A alteração essencial, feita por meio da ruptura com um anterior texto normativo, deverá caber ao trabalho do juiz ou, em termos mais amplos, da jurisprudência. Não temos valores jurídicos eternos e imutáveis e não podemos conceber princípios para todo o sempre, mas a mudança e construção de novas interpretações num texto constitucional são uma tarefa a realizar de forma comunitária pelos juristas e cidadãos, maxime pelos tribunais. (pg. 29)

As leis fiscais estão sempre sujeitas a um processo de discussão pública, uma vez que devem ser aprovadas pelo Parlamento, podendo a opinião pública facilmente reagir a movimentos perceptíveis de maior oneração fiscal quando o executivo se vê obrigado a aumentar impostos. 

No entanto, para além destas grandes decisões perceptíveis (por exemplo, quando a taxa do IVA aumenta 2 pp) a lei fiscal está sempre cheia de um conjunto de pequenas excepções, de regimes especiais, de benefícios fiscais que, ainda que no seu cômputo final alterem profundamente a distribuição da carga tributária, escapam quase sempre à percepção da grande maioria dos contribuintes. São excepções que estilhaçam a lógica interna do sistema e os princípios de oneração, são um conjunto de «contranormas» que o contribuinte normal percebe mal, mas que lhe transmitem a noção (exacta) de que as leis fiscais são injustas.

Estas sistemáticas criações de nichos de privilégio mediante a acção de lobistas foram minuciosamente estudadas nos EUA onde a enorme complexidade do tax code tem sido explicada por uma intensíssima e permanente interacção entre legisladores e interesses particulares. (pg.43)

Os benefícios fiscais [isenções] são uma excepção à regra da tributação [...] A desigualdade de tratamento entre factos semelhantes com alguns excluídos de tributação exige uma justificação, sob pena de um regresso aos privilégios fiscais. Tal justificação pode ser de ordem económica ou social. [...] Em todos estes casos poderemos encontrar razões para a atribuição de um regime fiscal mais favorável, mas a multiplicações destas razões -- e a consequente multiplicação de benefícios fiscais (que depois de serem concedidos tendem a perpetuar-se independentemente de um juízo renovado sobre a sua real eficácia) -- é um dos problemas principais dos sistemas fiscais de hoje.

Numa lógica liberal que se opõe à intervenção do Estado na economia, a atribuição de benefícios fiscais não deverá existir, ou, pelo menos, deverá ser desempenhada por subsídios. Em relação às consequências financeiras, o custo do subsídio é o mesmo que a receita perdida em virtude do benefício fiscal, com a vantagem de ser mais transparente e de a sua atribuição dever ser decidida todos os anos, orçamento após orçamento. (pg.49)

Os impostos sobre os combustíveis são a negação de tudo aquilo que aprendemos sobre a justiça fiscal: aumentando o preço da gasolina ou do gasóleo atingem-se principalmente os contribuintes com menor capacidade contributiva, cidadãos estes que podem ser obrigados a mudar de comportamento -- abandonar o uso do automóvel -- quando o imposto se junta ao aumento do preço do produto-base. E, no entanto, tudo visto e ponderado, estes impostos são justos. Mas justos em que sentido? 

Ao internalizar as externalidades negativas ligadas ao uso dos combustíveis fósseis, o imposto sobre os combustíveis amplifica um sinal que o mercado transmite de forma insuficiente: a necessidade de poupar energia por, nesta área, as flutuações do preço não conduzirem a uma situação de equilíbrio. Não conduzem, porque, a curto e médio prazo, os combustíveis fósseis são o método mais económico de produzir energia. Mas apenas a curto e médio prazo, e porque não se contabilizam os custos ambientais. [...] a inacção do Estado, com a ausência de políticas públicas sobre energias alternativas e a manutenção do petróleo para consumo interno a preços agradavelmente baixos, ainda que socialmente pareça justa, tem efeitos geopolíticos inaceitáveis [...] os argumentos ligados à eficiência económica e social desta tributação são tão fortes que se tornam um argumento de justiça. (pgs 69-71)

Outubro 27, 2014

Now, consciousness. That's a fun thing, isn't it? Product of an arms race between predators and prey. If you watch a cat creeping up on a mouse, you'll be able to impute to the cat intentions that are most easily explained by the cat having a theory of mind concerning the mouse – an internal simulation of the mouse's likely behavior when it notices the predator. Which way to run, for example. And the cat will use its theory of mind to optimize its attack strategy. Meanwhile, prey species that are complex enough to have a theory of mind are at a defensive advantage if they can anticipate a predator's actions. Eventually this very mammalian arms race gave us a species of social ape that used its theory of mind to facilitate signaling – so the tribe could work collectively – and then reflexively, to simulate the individual's own inner states. Put the two things together, signaling and introspective simulation, and you've got human-level consciousness, with language thrown in as a bonus – signaling that transmits information about internal states, not just crude signals such as 'predator here' or 'food there.' -- Charles Stross, Accelerando

Setembro 22, 2014

Orthogonal quotes

"What happens, happens," Carla offered gnomically. "Everything in the Cosmos has to be consistent. All we get to do is talk about it in a way that makes sense to us"

---

[...] imagine the time when wave mechanics powers every machine and everyone takes it for granted. Do you really want them thinking that it fell from the sky, fully formed, when the truth is that they owe their good fortune to the most powerful engine of change in the history: people arguing about science.

---

The cosmos is what it is. The laws of optics and mechanics and gravity are simple and elegant and universal... but a detailed description of all the things on which those laws play out seems to be nothing but a set of brute facts that need to be discovered individually. I mean, a 'typical' cosmos, in statistical terms, would be a gas in thermal equilibrium filling the void, with no solid objects at all. There certainly wouldn't be steep entropy gradients. We've only be treating the existence of such gradient as a 'law' because it was the most prominent fact in our lives: time came with a arrow distinguishing the past from the future.

Greg Egan, Orthogonal (books II & III)

Setembro 01, 2014

Primitive man, aware of his helplessness against the forces of Nature but totally ignorant of their causes, would try to compensate for his ignorance by inventing hypotheses about them [...]  For one who has no comprehension of physical law, but is aware of his own consciousness and volition, the natural question to ask is not: "What is causing it?", but rather: "Who is causing it?"  [...] The error [Mind Projection Fallacy] occurs in two complementary forms, which we might indicate thus: (a) My own imagination => Real Property of Nature, and (b) My own ignorance => Nature is indeterminate.

The philosophical dierence between conventional probability theory and probability theory as logic is that the former allows only sampling distributions, interprets them as physically real frequencies of "random variables", and rejects the notion of probability of an hypothesis as being meaningless. We take just the opposite position: that the probability of an hypothesis is the fundamental, necessary ingredient in all inference, and the notion of "randomness" is a red herring, at best irrelevant. [...] by "probability theory as logic" we mean nothing more than applying the standard product and sum rules of probability theory to whatever propositions are of interest in our problem.

We do not seek to explain "statistical behavior" because there is no such thing; what we see in Nature is physical behavior, which does not conflict in any way with deterministic physical law.

[...] as in any other problem of inference, we never ask, "Which quantities are random?" The relevant question is: "Which quantities are known, and which are unknown?"


Agosto 24, 2014

"He never sees [Thomas] More – a star in another firmament, who acknowledges him with a grim nod – without wanting to ask him, what's wrong with you? Or what's wrong with me? Why does everything you know, and everything you've learned, confirm you in what you believed before? Whereas in my case, what I grew up with, and what I thought I believed, is chipped away a little and a little, a fragment then a piece and then a piece more. With every month that passes, the corners are knocked off the certainties of this world: and the next world too. Show me where it says, in the Bible, ‘Purgatory’. Show me where it says relics, monks, nuns. Show me where it says ‘Pope’." 

"[...] it is no use to justify yourself. It is no good to explain. It is weak to be anecdotal. It is wise to conceal the past even if there is nothing to conceal. A man's power is in the half-light, in the half-seen movements of his hand and the unguessed-at expression of his face. It is the absence of facts that frightens people: the gap you open, into which they pour their fears, fantasies, desires."

Wolf Hall, Hilary Mantel

Maio 25, 2014

In the eye of the beholder

"Neither good nor ill is done to us by Fortune: she merely offers us the matter and the seeds: our soul, more powerful than she is, can mould it or sow them as she pleases, being the only cause and mistress of our happy state or our unhappiness. Whatever comes to us from outside takes its savour and its colour from our internal attributes, just as our garments warm us not with their heat but ours, which they serve to preserve and sustain. Shelter a cold body under them and it will draw similar services from them for its coldness: that is how we conserve snow and ice. Study to the lazy, like abstinence from wine to the drunkard, is torture; frugal living to the seeker after pleasure, like exercise to the languid idle man, is torment: so too for everything else. Things are not all that painful nor harsh in themselves: it is our weakness, our slackness, which makes them so. To judge great and lofty things we need a mind which is like them: otherwise we attribute to them the viciousness which belongs to ourselves. A straight oar seems bent in water. It is not only seeing which counts: how we see counts too." Essay XIV, "That the taste of good and evil things depends in large part on the opinion we have of them", Michel de Montaigne

Maio 21, 2014

Magic


Maio 18, 2014

Vices

"In plain truth, lying is an accursed vice. We are not men, nor have other tie upon one another, but by our word. If we did but discover the horror and gravity of it, we should pursue it with fire and sword, and more justly than other crimes. I see that parents commonly, and with indiscretion enough, correct their children for little innocent faults, and torment them for wanton tricks, that have neither impression nor consequence; whereas, in my opinion, lying only, and, which is of something a lower form, obstinacy, are the faults which are to be severely whipped out of them, both in their infancy and in their progress, otherwise they grow up and increase with them; and after a tongue has once got the knack of lying, 'tis not to be imagined how impossible it is to reclaim it whence it comes to pass that we see some, who are otherwise very honest men, so subject and enslaved to this vice. I have an honest lad to my tailor, whom I never knew guilty of one truth, no, not when it had been to his advantage. If falsehood had, like truth, but one face only, we should be upon better terms; for we should then take for certain the contrary to what the liar says: but the reverse of truth has a hundred thousand forms, and a field indefinite, without bound or limit. The Pythagoreans make good to be certain and finite, and evil, infinite and uncertain. There are a thousand ways to miss the white, there is only one to hit it." -- Essays IX, "Of Liars", Michel de Montaigne

Janeiro 31, 2014

Unwelt II

"In 1909, the biologist Jakob von Uexküll introduced the concept of the umwelt. He wanted a word to express a simple (but often overlooked) observation: different animals in the same ecosystem pick up on different environmental signals. In the blind and deaf world of the tick, the important signals are temperature and the odor of butyric acid. For the black ghost knifefish, it's electrical fields. For the echolocating bat, it's air-compression waves. The small subset of the world that an animal is able to detect is its umwelt. The bigger reality, whatever that might mean, is called the umgebung. The interesting part is that each organism presumably assumes its umwelt to be the entire objective reality "out there." Why would any of us stop to think that there is more beyond what we can sense?" David M. Eagleman

Janeiro 17, 2014

A impossibilidade do realismo

"What we would all like [...] is an understanding of the fundamental processes that govern the Universe, an understanding that is not just useful for calculation but an understanding that is true in some deeper sense. Typically, a scientist sees the latter point as either obvious and important, or else completely irrelevant. I would like to argue that we don’t have a choice; there is some very clear sense in which truth is not what is returned by any finite scientific investigation; all that is returned is plausibilities (some of which become very very high), and those plausibilities relate not directly to the truth of the hypotheses in question, but rather to their use or value in describing the data. 

The fundamental reason scientific investigations can’t obtain literal truth is that no scientific investigator ever has an exhaustive (and mutually exclusive) set of hypotheses. Plausibility calculations are calculations of measure in some space, which for our purposes we can take to be the space formed by the union of every possible set of scientific hypotheses, with their parameters and adjustments set to every possible set of values." -- David Hogg, Is cosmology just a plausibility argument?.

Janeiro 15, 2014

Reductionism

[...] reductionism is not so much a positive hypothesis, as the absence of belief—in particular, disbelief in a form of the Mind Projection Fallacy. [...] we use entirely different models to understand the aerodynamics of a 747 and a collision between gold nuclei in the Relativistic Heavy Ion Collider.  A computer modeling the aerodynamics of a 747 may not contain a single token, a single bit of RAM, that represents a quark. So is the 747 made of something other than quarks?  No, you're just modeling it with representational elements that do not have a one-to-one correspondence with the quarks of the 747.  The map is not the territory. [...] As the saying goes, "The map is not the territory, but you can't fold up the territory and put it in your glove compartment."  Sometimes you need a smaller map to fit in a more cramped glove compartment—but this does not change the territory.  The scale of a map is not a fact about the territory, it's a fact about the map.

[...]

To build a fully accurate model of the 747, it is not necessary, in principle, for the model to contain explicit descriptions of things like airflow and lift.  There does not have to be a single token, a single bit of RAM, that corresponds to the position of the wings.  It is possible, in principle, to build an accurate model of the 747 that makes no mention of anything except elementary particle fields and fundamental forces.
"What?" cries the antireductionist.  "Are you telling me the 747 doesn't really have wings?  I can see the wings right there!"
The notion here is a subtle one.  It's not just the notion that an object can have different descriptions at different levels.
It's the notion that "having different descriptions at different levels" is itself something you say that belongs in the realm of Talking About Maps, not the realm of Talking About Territory.

It's not that the airplane itself, the laws of physics themselves, use different descriptions at different levels—as yonder artillery gunner thought.  Rather we, for our convenience, use different simplified models at different levels.

[...]

So when your mind simultaneously believes explicit descriptions of many different levels, and believes explicit rules for transiting between levels, as part of an efficient combined model, it feels like you are seeing a system that is made of different level descriptions and their rules for interaction.

But this is just the brain trying to be efficiently compress an object that it cannot remotely begin to model on a fundamental level.  The airplane is too large.  Even a hydrogen atom would be too large.  Quark-to-quark interactions are insanely intractable.  You can't handle the truth.

But the way physics really works, as far as we can tell, is that there is only the most basic level—the elementary particle fields and fundamental forces.  You can't handle the raw truth, but reality can handle it without the slightest simplification.  (I wish I knew where Reality got its computing power.)

The laws of physics do not contain distinct additional causal entities that correspond to lift or airplane wings, the way that the mind of an engineer contains distinct additional cognitive entities that correspond to lift or airplane wings.

This, as I see it, is the thesis of reductionism.  Reductionism is not a positive belief, but rather, a disbelief that the higher levels of simplified multilevel models are out there in the territory.  Understanding this on a gut level dissolves the question of "How can you say the airplane doesn't really have wings, when I can see the wings right there?"  The critical words are really and see." -- Yudkowsky (http://lesswrong.com/lw/on/reductionism/)

DanielLC reply to another comment: "One minor quibble; how do we know there is any most basic level?". Levels are an attribute of the map. The territory only has one level. Its only level is the most basic one. Let's consider a fractal. The Mandelbrot set can be made by taking the union of infinitely many iterations. You could think of each additional iteration as a better map. That being said, either a point is in the Mandelbrot set or it is not. The set itself only has one level.

Dezembro 14, 2013

Farewell to Reality

"[...] reality is a metaphysical concept — it lies beyond the grasp of science. When we adopt specific beliefs about reality, what we are actually doing is adopting a specific philosophical position

There is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about nature.

This ‘working model’ of science acknowledges that reality-in-itself is metaphysical, that the objects of scientific study are the shadows, the things-as-they-appear or things-as-they-are-measured. It accepts that the facts that scientists work with are not theory-neutral — they do not come completely free from contamination by theoretical concepts. It accepts that theories are in their turn populated by metaphysical concepts and mathematical abstractions and are derived by any method that works, from induction to the most extreme speculation. It acknowledges that theories can never be accepted as the ultimate truth. Instead, they are accepted as possessing a high truth-likeness or verisimilitude — they correspond to the facts. In this way they become part of the authorized version of empirical reality. Finally, the model acknowledges the important role played by the Copernican attitude. Science works best when we resist the temptation to see ourselves as the primary objective or purpose of reality" -- Jim Baggott, Farewell to Reality

Outubro 23, 2013

Segurança


"O que acontece quando queremos ter alguém num contrato de associação mas depois não conseguimos ter ninguém  a tempo inteiro?

A P. é uma mulher 30 anos, bancária, vive sozinha, faz o que gosta. Tem  uma história familiar que a faz desconfiar do purgatório das  boas intenções:  andou de um lado para o outro, entre pais e avós ( problemas de migrações, distâncias, chegadas). Passada a fase dos amores em prato do dia, sente agora a falta de um respaldo. Pois, mas P. tem uma pedra no sapato: como confiar?
A pergunta dela é uma boa pergunta como dizia o Jim Hacker do  Yes , Minister, porque é uma pergunta que todos fazem, mas atira ao lado. P. somatizou a ansiedade destes anos e, por coincidência, foi a pele, a última fronteira, que pagou. Para sobremesa, desenvolveu um jogo de damas com o evitamento fóbico: só está onde pode estar. A ilusão do controlo também tem direito à vida.
O desejo é a distância tornada sensível, registou  um senhor  (Blanchot) com que incomodo sempre os meus leitores de blogues. Uma das interpretações : o desejo é o que te torna indefeso, é o que anula a  distância. A P. tem olhado para  a confiança como condição prévia e por  isso todas as distâncias lhe parecem estradas de salteadores." -- Filipe Nunes Vicente 

Eu sou ainda mais literal na frase de Blanchot. Somos, temos, distância para quase tudo mas nem tudo é motivo de atenção, de posse (enfim, de desejo). Aquilo que queremos, o que assim passa a alvo, começa a ecoar no nosso mundo interno. A distância que sempre lá esteve torna-se visível. Mais um dos muitos faróis que nos guia os erros.

Agosto 05, 2013

Philosophy in The Flesh II

the mind is embodied, not in any trivial sense (e.g., the "wetware" of the brain runs the software of the mind), but in the deep sense that our conceptual systems and our capacity for thought are shaped by the nature of our brains, our bodies, and our bodily interactions. There is no mind separate from and independent of the body, nor are there thoughts that have an existence independent of bodies and brains. (pg.265)

the assertion that empirical knowledge of our moral cognition can have no normative implications, is based on a false dichotomy between facts and values. Owen Flanagan (Cl, 1991) has demonstrated the relevance of moral psychology for moral theory by showing that no morality can be adequate if it is inconsistent with what we know about moral development, emotions, gender differences, and self-identity. Johnson (Cl, 1993) argues that facts about human conceptualization and reasoning place normative constraints on what we can morally demand of ourselves and others. For example, any view of morality that involves absolute moral principles defined by literal concepts cannot be cognitively realistic for human beings, whose moral categories often involve radial structure, conceptual metaphor, and metonymy. Damasio's (B1, 1994) work with brain damaged patients who have lost the ability to perform certain kinds of practical reasoning because their emotional experience is impaired suggests that moral deliberation cannot be the product of an allegedly pure reason. Moral deliberation always requires emotional monitoring and an interplay of affect and reason. (pg.326)

Philosophical theories, like all theories, do not and cannot spring full-blown from some alleged pure, transcendent reason. Instead, philosophy is built up with the conceptual and inferential resources of a culture, even though it may transform and creatively extend those resources. These cognitive resources are not arbitrary or merely culturally constructed. They depend on the nature of our embodied experience, which includes both the constraints set by our bodily makeup and those imposed by the environments we inhabit. (pg.341)

It is natural to ask questions about the nature of things. As Aristotle said at the beginning of the Metaphysics, "All men by nature desire to know." We desire to know, for practical reasons, if the mushroom we are about to eat is poisonous. We desire to know, for ethical reasons, if there is some natural difference between men and women. We desire to know, for purely intellectual reasons, whether the universe will come to an end someday. 

The very project of seeking knowledge assumes that the world makes systematic sense, that it is not just a random collection of individual phenomena. It is not just determined by the capricious whims of gods who are fickle, mischievous, and cruel, but, rather, it is a "cosmos," a rationally structured whole. In other words, to seek knowledge, we must assume that the world is not absurd. It also assumes that we can gain knowledge of the world. 

These two assumptions together define what has come down to us as a commonplace folk theory that we take for granted any time we seek any kind of systematic knowledge:

THE FOLK THEORY OF THE INTELLIGIBILITY OF THE WORLD
The world makes systematic sense, and we can gain knowledge of it.

Thus it is natural for us to ask what things are like and why they behave the way they do. Moreover, we seek general knowledge, knowledge about kinds of things, not just particular knowledge that pertains only to a single entity. We want to know whether this mushroom is edible, but our knowledge of it depends on our knowledge of the general kind of mushroom it is. We want to know whether men and women are somehow fundamentally different and not just whether this man differs in certain particular ways from this woman. And we assume that such questions have answers, that if we can formulate such a question, there is a fact of the matter that answers it. In other words, much of the time we assume two particular folk theories about things in general:

THE FOLK THEORY OF GENERAL KINDS
Every particular thing is a kind of thing.

THE FOLK THEORY OF ESSENCES
Every entity has an "essence" or "nature," that is, a collection of properties that makes it the kind of thing it is and that is the causal source of its natural behavior.

The Folk Theory of Essences is metaphorical in two ways. First, the very idea of an essence is based on physical properties that compose the basis of everyday categorization: substance and form. For example, a tree is made of wood and has a form that includes a trunk, branches, leaves, roots, bark, and so on. It also has a pattern of change (another kind of form) in which the tree grows from seed to sapling to mature specimen. These are the physical bases on which we categorize an object as a tree: substance, form, and pattern of change. Where an essence is seen as a collection of physical properties, it is seen as one or more of these things. In the case of abstract essences, these three physical properties become source domains for metaphors of essence: Essence As Substance, Essence As Form, and Essence As Pattern Of Change. 

The second way in which the concept of essence is metaphorical concerns its role as a causal source. The intuition is this: If a tree is made of wood, it will burn. Because it has a trunk and stands erect, it can fall over. The idea is that the natural behavior of a tree is a causal consequence of the properties that make it the kind of thing it is: The tree burns because it is made of wood. We have the same intuition about abstract essences, like a person's character. Honest people will tell the truth. Their essence as honest is the causal source of their truth telling. In such cases, we are clearly in the domain of the metaphorical, because we are attributing to a person a metaphorical substance called "character," which has causal powers. An immediate consequence of these two folk theories is the foundational assumption behind all philosophical metaphysics:

THE FOUNDATIONAL ASSUMPTION OF METAPHYSICS
Kinds exist and are defined by essences.

It is important to see how a natural desire to know leads so easily to metaphysical speculation, for as soon as we believe that kinds exist, what we shall call the metaphysical impulse takes over. We can apply the Folk Theory of Essences to kinds themselves, from which it follows that there are kinds of kinds and that these kinds of kinds themselves are defined by essences. This iteration is a fateful step; it is the first step toward metaphysics in Western philosophy.

This metaphysical impulse lies at the heart not only of Western philosophy but of all Western science, leading physicists to seek a general field theory, or as it has come to he known, "a theory of everything." In biology, there is a similar quest for a theory of life. Such theories seek to find some essence that characterizes the behavior of things in some general domain of study: physical phenomena, life, the mind, language, and so on. Questions like "What is the mind?" or "What is life?" presuppose the meaningfulness of such a quest for general knowledge. 

Whether we like it or not, we are all metaphysicians. We do assume that there is a nature of things, and we are led by the metaphysical impulse to seek knowledge at higher and higher levels, defined by ever more general categories of things. Once we have started on this search for higher and higher categories and essences, there are three possible alternatives:

  1. The world may not he systematically organized, or we may not he able to know it, above a certain level of generalization, which might even he relatively low in the hierarchy of categories. In other words, there may be a limit to the systematicity of the world or to its intelligibility.
  2. The hierarchy of categories may go on indefinitely, with no level at which an all-inclusive category exists. In this case, the world might be systematic, but not completely intelligible. The process of gaining knowledge of the world would be an infinite, and hence uncompletable, task. 
  3. The iteration up the hierarchy of categories and essences might terminate with an all-inclusive category, whose essence would explain the nature of all things. Only in this case would the world he totally intelligible, at least in principle. 
This third alternative is what we call:

THE FOLK THEORY OF THE ALL-INCLUSIVE CATEGORY
There is a category of all things that exist.

From the Folk Theory of Essences, it follows that this all-inclusive category has an essence, and from the Folk Theory of Intelligibility, it follows that we can at least in principle gain knowledge of that essence. This all-inclusive category is called Being, and its essence is called the Essence of Being.

This third alternative, that the world is completely systematic and knowable, is the most hopeful, least skeptical attitude that someone concerned with seeking general knowledge can take. However, such optimism brings with it a substantial ontological presupposition, that there is a category of Being, and that, since it must have an essence, there is an Essence of Being. As we will see below, there is a profound problem that arises from this ultimate metaphysical impulse, as defined by these four commonplace folk theories. They lead us to ask a set of questions that may not be meaningful. And they give us a view of the world and of knowledge that may he misleading.

To see why this is so, we propose to apply the tools of embodied cognitive science to the emergence of explicit metaphysical thinking in the Western philosophical tradition. The foundational metaphysical projects of Western philosophy were formulated by Aristotle. In early pre-Socratic philosophy, there are hints of this way of thinking about nature that, in Aristotle, finally and explicitly become the quest for an understanding of Being as the ultimate form of knowledge. This sets the stage both for Western science and for theological interpretations of God as Ultimate Being. (pgs 346-9)

George Lakoff & Mark Johnson - Philosophy in The Flesh (1999)

Julho 29, 2013

Philosophy in the Flesh I

[...] philosophers have asked whether time in itself is bounded or unbounded; whether it is continuous or divisible; whether it flows; whether the passage of time is the same for everyone and everything everywhere; whether time is directional and if so whether its direction is a consequence of change, causation, or possibility; whether there can be time without change; whether it loops back on itself; and so on. How we happen to conceptualize time has been seen as irrelevant to such questions. It is assumed that philosophical inquiry can proceed without knowing or caring about the details of how human beings happen to conceptualize what is being studied. (pg.135)

[...] the metaphorical nature of our conceptual system, if unrecognized, can lead philosophers astray. Two things lead to such philosophical errors. First, a philosopher may fail to recognize conceptual metaphor and hence may see metaphorical sentences as literal and take them at face value. Once one takes a metaphor as being literal, the second error is to assume the correspondence theory of truth and therefore to regard the objective world as structured by the metaphor. [...] Augustine dramatized these errors in the eleventh chapter of his Confessions in his discussion of what constitutes a long time. Just when, he asks, is a time long? Is it long when it is present, or when it is past or future? [...] As a literal, metaphysical question about time, there is no answer, since only a short part of a process can occur at any present time. Augustine's answer is interesting. Past, present, and future, he says, do all "exist in some sort in the soul, but otherwhere I do not see them." A cognitive scientist who speaks about minds instead of souls might echo Augustine in contemporary terms, saying that the very idea of "lengths of time" is conceptual, and indeed metaphoric. Our very notion of a "long time" or "long process" is a product of our use of spatial metaphor.

Zeno's paradox of the arrow can also be seen as pointing out the mistake of taking a metaphor to be literal (though he didn't understand it as such). Suppose, Zeno argues, that time really is a sequence of points constituting a time line. Consider the flight of an arrow. At any point in time, the arrow is at some fixed location. At a later point, it is at another fixed location. The flight of the arrow would be like the sequence of still frames that make up a movie. Since the arrow is located at a single fixed place at every time, where, asks Zeno, is the motion? Time, Zeno argues, is not divided up into instants. In our terms, the idea that time is a linear sequence of points is metaphorical, a consequence of times seen as locations in the Moving Observer metaphor. The mistake, once again, is to take what is metaphorical as literal. [...] The appearance of paradox comes from attributing real existence to metaphorical point locations. Zeno's brilliance was to concoct an example that forced a contradiction upon us: literal motion and motion metaphorically conceptualized as a sequence of fixed locations at fixed points in time.

Such observations by Zeno and Augustine are not mere conundrums dreamed up in ancient and medieval philosophy, conundrums that are irrelevant today. They are early insights into the fact that our conceptual systems are not literal. They show that the most common concepts that we use every day and in terms of which we state our truths cannot he taken as literally fitting an objective reality. (pgs.156-158)

many of us would take a sentence like "Time is flowing by rapidly" to be true. Suppose you take this metaphor as being literal; that is, you assume that there really is a "flow" of time past us. This entails that the future is flowing toward us from somewhere and that it presently exists at the future "place." In short, it implies that the future, at least some of it, must exist at the present. [...] If you do not realize the metaphorical nature of the question, you might be led to ask, as some philosophers have, "If time flows, it has to flow at a rate relative to time. Mustn't there be some higher-order time relative to which time itself flows? " The question arises from taking the metaphor literally. To treat it as a deep metaphysical question would be silly. (pg.159)

Philosophers have observed that taking the theory of general relativity as literally true entails that the past, present, and future all exist "at once." That is, the theory seems to suggest determinism and the impossibility of free will or even random probabilistic events, as required by quantum mechanics. Of course, if one recognizes that general relativity uses our common metaphor for conceptualizing time metaphorically in terms of space, one need not reach such metaphysical conclusions. One can see general relativity as metaphorical. This does not make general relativity either false or fanciful or subjective, since its metaphors can still be apt. That is, they can entail non metaphorical predictions that can be verified or falsified. In general, to say that a science is metaphorical is not to belittle it. Because metaphors preserve inferences, and because those inferences can have non metaphorical consequences, one can often test whether or not a scientific metaphor is apt. Indeed, metaphor is what allows mathematical models to be linked to phenomena in the world and to be regarded as scientific theories. (pg.160)

What exactly was proved when Einstein's theory was "confirmed"? Einstein's theory claimed that a large body like the sun should create a significant space-time curvature in its immediate vicinity. If a light ray passed near the sun, it should follow a curved path. This was seen as providing for a test of the gravitational-pull theory versus the space-time-curvature theory. It was assumed that light had no mass; hence there should be no "pull" and the light should travel in a straight line by the sun. But if space-time was curved near the sun, such a light ray should travel along a curved path, mass or no mass. During an eclipse of the sun, the position was observed of a star that could not normally be seen next to the sun when it was shining. If space-time was curved, the light from the star should move in a curved path by the sun, and the star should appear shifted over a few degrees. The measurement was made during a 1919 eclipse, and Einstein's calculation of where the star should appear was verified. Einstein's theory was taken as confirmed-and interpreted literally: There is no force of gravity. What we've been calling that force is space-time curvature. 

Einstein's theory need not have been interpreted literally. One could have said: Einstein has created a beautiful metaphorical system for doing calculations of the motion of light in a gravitational field. The metaphor of space as a temporal dimension allows him to use well understood mathematics to do his calculations. That is a magnificent metaphorical accomplishment. But that doesn't mean we have to understand that theory as characterizing the objectively true nature of the universe. (pg.228)

In superstring theory, all forces-gravitational, electromagnetic, and strong and weak nuclear forces-are conceptualized as curvatures in ten-dimensional space. What this does is allow the same mathematics, Riemannian geometry, to be used to calculate all of what we ordinarily call "forces." But of course, if one takes this theory literally, no forces at all exist as forces. What we used to conceptualize as forces are now all curvatures in ten-dimensional space. If we take superstring theory literally, no forces exist at all. And we live in a radically multidimensional universe, one with ten dimensions! Do we "really" live in a world with ten or more dimensions, many of them very small, with no forces but lots of curvatures in multidimensional space? Or is superstring theory an ingenious and productive technical metaphor that allows all calculations of force to be unified using the same mathematics - Riemannian geometry? These are not mutually exclusive alternatives. From the perspective of the everyday human conceptual system, superstring theory is metaphorical, as is general relativity, as is Newtonian mechanics. To take any of these theories literally is to say that force, and therefore causation, is nonexistent. But to take these scientific theories metaphorically is to allow for the "existence" of causes from our everyday perspective. (pg.230)

One important thing that cognitive science has revealed clearly is that we have multiple conceptual means for understanding and thinking about situations. What we take as "true" depends on how we conceptualize the situation at hand. From the perspective of our ordinary visual experience, the sun does rise; it does move up from behind the horizon. From the perspective of our scientific knowledge, it does not. Similarly, when we lift an object, we experience ourselves exerting a force to overcome a force pulling the object down. From the standpoint of our basic level experience, the force of gravity does exist, no matter what the general theory of relativity says. But if we are physicists concerned with calculating how light will move in the presence of a large mass, then it is advantageous to take the perspective of general relativity, in which there is no gravitational force. It is not that one is objectively true while the other is not. Both are human perspectives. One, the nonscientific one, is literal relative to human, body based conceptual systems. The other, the scientific one, is metaphorical relative to human, body-based conceptual systems. From the metaphorical scientific perspective of general relativity and superstring theory, gravitational force does not exist as an entity-instead it is space-time curvature. From the literal, nonscientific perspective, forces exist. Now, if we take one scientific theory or another as being literally true, and if we insist that there is only one truth and it is the best scientific truth we have, then, as Russell observed, force does not exist, and so neither does causation. If, however, we can allow scientific theories to be recognized for the metaphorical conceptual structures that they are for human beings, then we can allow multiple ways of conceptualizing the world, including both the scientific and nonscientific. Allowing for the multiple perspectives indicated by cognitive analyses allows us to maintain both scientific perspectives, in which causation doesn't exist, and our everyday perspective, in which it does. (pgs.231-2)

When someone asks, "Does causation exist?" that person usually wants to know whether there is a single unified phenomenon (which is called "causation") objectively existing in the mind independent world and operating according to a single logic. Furthermore, he or she assumes that there is a straightforward simple yes-or-no answer. As we have seen, the situation is more complex than that. But the presuppositions lying behind this apparently simple question are massively false. First, causation is a word in a human language and it designates a human category, a radial category of extraordinary complexity. In that complex radial category, there is no set of necessary and sufficient conditions that covers all the cases of causation. Therefore, causation as we conceptualize it is not a unified phenomenon. It does not simply designate an objectively existing category of phenomena, defined by necessary and sufficient conditions and operating with a single logic in the mind-independent world. Because the presuppositions lying behind the question are so far off base, the question has no simple straightforward answer. This eliminates a simpleminded realism that assumes that our language is simply a reflection of the mind-independent world, and hence that such questions are simple and straightforward. But eliminating simpleminded realism does not eliminate all forms of realism, and it does not require either idealism or total relativism. What remains is an embodied realism that recognizes that human language and thought are structured by, and bound to, embodied experience. In the case of physics, there is certainly a mind-independent world. But in order to conceptualize and describe it, we must use embodied human concepts and human language. Certain of those embodied human concepts, the basic-level ones, accord very well with middle-level physical experience and therefore have an epistemic priority for us. It is here that we feel comfortable saying that causation exists for ordinary cases of the direct application of physical force in our everyday lives. The central prototypical case in our basic-level experience gives us no problem in answering the question. He punched me in the arm. He caused me pain. Yes, causation exists. (pg.233)

George Lakoff & Mark Johnson - Philosophy in The Flesh (1999)