Epistemic Uncertainty Quotes

What is believed to be a fact is only a fact until another fact supersedes it. Science is only a fashion. Nothing more.

Forever I shall be a stranger to myself. In psychology as in logic, there are truths but no truth.

To achieve accurate knowledge of others, if such a thing were possible, we could only ever arrive at it through the slow and unsure recognition of our own initial optical inaccuracies. However, such knowledge is not possible: for, while our vision of others is being adjusted, they, who are not made of mere brute matter, are also changing; we think we have managed to see them more clearly, but they shift; and when we believe we have them fully in focus, it is merely our older images of them that we have clarified, but which are themselves already out of date.

I think that we shall have to get accustomed to the idea that we must not look upon science as a 'body of knowledge,' but rather as a system of hypotheses; that is to say, as a system of guesses or anticipations which in principle cannot be justified, but with which we work as long as they stand up to tests, and of which we are never justified in saying that we know they are 'true' or 'more or less certain' or even 'probable.'

We find that the statements of science are not of what is true and what is not true, but statements of what is known with different degrees of certainty: "It is very much more likely that so and so is true than that it is not true".

It seems that there's a constant humbling - I don't know if that's the right word - because things are disproved all the time with new discoveries, at least that's the way it feels sometimes in the layman's world. Like, people will make proclamations of something to be true, and then 50 years later that's proven wrong because there's something else.

It has not yet become obvious to me that there's no real problem. I cannot define the real problem; therefore, I suspect there's no real problem, but I'm not sure there's no real problem.

The trouble begins when we start to be so impressed by the strategies of our systematized thought that we forget that it does relate to an obverse, that it is hewn from negation, that it is but very small security against the void of negation which surrounds it.

One's mind and the earth are in a constant state of erosion, mental rivers wear away abstract banks, brain waves undermine cliffs of thought, ideas decompose into stones of unknowing, and conceptual crystallizations break apart into deposits of gritty reason.

It is natural that people should differ most, and most violently, about the unknowable . . . There is all the room in the world for divergence of opinion about something that, so far as we can realistically perceive, does not exist.

I believe that either Jupiter has life or it doesn't. But I neither believe that it does, nor do I believe that it doesn't.