Quotessence
Home / Topics / A Priori Quotes

A Priori Quotes

Browse 11 quotes about A Priori.

A Priori Quotes

“To select arbitrarily a set of first principles, and to make all our studies subordinate to them, is in effect to establish an intellectual dictatorship amd to kill the freedom of mind. It is true that it would give us orderliness, but it would be the orderliness of death.”

“Our brain is therefore not simply passively subjected to sensory inputs. From the get-go, it already possesses a set of abstract hypotheses, an accumulated wisdom that emerged through the sift of Darwinian evolution and which it now projects onto the outside world. Not all scientists agree with this idea, but I consider it a central point: the naive empiricist philosophy underlying many of today's artificial neural networks is wrong. It is simply not true that we are born with completely disorganized circuits devoid of any knowledge, which later receive the imprint of their environment. Learning, in man and machine, always starts from a set of a priori hypotheses, which are projected onto the incoming data, and from which the system selects those that are best suited to the current environment. As Jean-Pierre Changeux stated in his best-selling book Neuronal Man (1985), “To learn is to eliminate.”

“Yann LeCun's strategy provides a good example of a much more general notion: the exploitation of innate knowledge. Convolutional neural networks learn better and faster than other types of neural networks because they do not learn everything. They incorporate, in their very architecture, a strong hypothesis: what I learn in one place can be generalized everywhere else. The main problem with image recognition is invariance: I have to recognize an object, whatever its position and size, even if it moves to the right or left, farther or closer. It is a challenge, but it is also a very strong constraint: I can expect the very same clues to help me recognize a face anywhere in space. By replicating the same algorithm everywhere, convolutional networks effectively exploit this constraint: they integrate it into their very structure. Innately, prior to any learning, the system already “knows” this key property of the visual world. It does not learn invariance, but assumes it a priori and uses it to reduce the learning space-clever indeed!”

“The moral here is that nature and nurture should not be opposed. Pure learning, in the absence of any innate constraints, simply does not exist. Any learning algorithm contains, in one way or another, a set of assumptions about the domain to be learned. Rather than trying to learn everything from scratch, it is much more effective to rely on prior assumptions that clearly delineate the basic laws of the domain that must be explored, and integrate these laws into the very architecture of the system. The more innate assumptions there are, the faster learning is (provided, of course, that these assumptions are correct!). This is universally true. It would be wrong, for example, to think that the AlphaGo Zero software, which trained itself in Go by playing against itself, started from nothing: its initial representation included, among other things, knowledge of the topography and symmetries of the game, which divided the search space by a factor of eight. Our brain too is molded with assumptions of all kinds. Shortly, we will see that, at birth, babies' brains are already organized and knowledgeable. They know, implicitly, that the world is made of things that move only when pushed, without ever interpenetrating each other (solid objects)—and also that it contains much stranger entities that speak and move by themselves (people). No need to learn these laws: since they are true everywhere humans live, our genome hardwires them into the brain, thus constraining and speeding up learning. Babies do not have to learn everything about the world: their brains are full of innate constraints, and only the specific parameters that vary unpredictably (such as face shape, eye color, tone of voice, and individual tastes of the people around them) remain to be acquired.”

“The “Empirical Fallacy” is that experience is knowledge when in fact it is just experience. A person could have infinite experiences and literally know nothing about what reality is. A person could perform a trillion observations and have no more clue about what reality is than someone performing divination in the ancient world, or a cockroach. It is not perceptualism that has led to humanity’s body of knowledge, it is conceptualism. Humanity doesn’t perceive better today, it conceives better, and that is purely thanks to mathematics, reason and logic.”

“The whole shtick of scientism revolves around sensory evidence. How many times must it be said that there is no such thing as self-explanatory sensory evidence? All evidence must be interpreted, and the interpretation is not a perceiving activity but a judging activity. The catastrophic error that worshipers of scientism (autistic sensing types) commit is that they privilege perceiving over judging. They believe that perception is the most important thing, and that judgment must be directed to the maximum degree possible at the perception, and minimize and indeed eliminate any reference to anything that has not been perceived. For worshipers of scientism, perception comes first, and judging is secondary, determined by perceiving. That is what empiricism is all about. It claims that all knowledge comes from experience, that there are no innate ideas, and it revolves around synthetic propositions and a posteriori knowledge. Rationalism, by total contrast, asserts that knowledge comes from logical, rational deduction and that innate ideas form the only secure basis for knowledge. It deals with analytic propositions and a priori knowledge.”

“Empiricists say, “Where’s your evidence?” In fact, our evidence is every piece of evidence ever gathered by science. Our disagreement is not with the evidence, it’s with the interpretation of the evidence. Every scientist interprets the evidence via the Meta Paradigm of empiricism and materialism, leading to wholly bizarre and irrational conclusions. The correct way to interpret the evidence is via rationalism and idealism. When has any scientific experiment ever refuted rationalism and idealism and proved the truth of empiricism and materialism? Scientists are so ignorant and philosophically illiterate that they don’t even realize they are engaged in interpretation rather than factuality.”

“Among all the occurrences possible in the universe the a priori probability of any particular one of them verges upon zero. Yet the universe exists; particular events must take place in it, the probability of which (before the event) was infinitesimal. At the present time we have no legitimate grounds for either asserting or denying that life got off to but a single start on earth, and that, as a consequence, before it appeared its chances of occurring were next to nil. ... Destiny is written concurrently with the event, not prior to it... The universe was not pregnant with life nor the biosphere with man. Our number came up in the Monte Carlo game. Is it surprising that, like the person who has just made a million at the casino, we should feel strange and a little unreal?”

“The fundamental basis by which the court’s decision might be made is, in itself, imperfect and subject to contradictions. There is very little consideration given to a priori knowledge regarding the circumstances being presented and as a result, arguments must be made empirically, under the assumption that assumptions themselves are, in fact, likely to give way to specious reasoning...Decisions must be made meticulously and according to specific, yet immeasurable criteria that can only be further manipulated by any cunning lawyer with the ability to make emotional pleas based on a requisite amount of inconsequential evidence to affect a decision beneficial to his clients. And so, in this respect, the law is capable of proving nothing except that its absurd attention to detail is really a kind of a façade meant to cover up the fact that a truly logical and just way to deal with such matters has not yet been devised. And the absence of adequate definition to its principles has given way to a kind of apathy among the men employed by the courts, who want nothing more now than to make a living for themselves and their families and not work themselves into too much of a frenzy about how little can be changed through their own initiative. Thus things aren’t likely to.”