[The aim of science is] to explain what so far has taken to be an explicans, such as a law of nature.… — Karl Popper Copy Share Image
We have the right not to tolerate the intolerant. We should tolerate even them whenever we can do so without running a… — Karl Popper Copy Share Image
No number of sightings of white swans can prove the theory that all swans are white. The sighting of just one black… — Karl Popper Copy Share Image
Aestheticism and radicalism must lead us to jettison reason, and to replace it by a desperate hope for political miracles. This irrational… — Karl Popper Copy Share Image
Is the world ruled by strict laws or not? This question I regard as metaphysical. The laws we find are always hypotheses;… — Karl Popper Copy Share Image
Some scientists find, or so it seems, that they get their best ideas when smoking; others by drinking coffee or whisky. Thus… — Karl Popper Copy Share Image
Rationalism is an attitude of readiness to listen to contrary arguments and to learn from experience... of admitting that "I may be… — Karl Popper Copy Share Image
No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct... — Karl Popper Copy Share Image
A system such as classical mechanics may be 'scientific' to any degree you like; but those who uphold it dogmatically - believing,… — Karl Popper Copy Share Image
I don't know whether God exists or not. ... Some forms of atheism are arrogant and ignorant and should be rejected, but… — Karl Popper Copy Share Image
Understanding a theory has, indeed, much in common with understanding a human personality. We may know or understand a man's system of… — Karl Popper Copy Share Image
The method of science depends on our attempts to describe the world with simple theories: theories that are complex may become untestable,… — Karl Popper Copy Share Image
Psychologism is, I believe, correct only in so far as it insists upon what may be called 'methodological individualism' as opposed to… — Karl Popper Copy Share Image
I may be wrong and you may be right, and by an effort, we may get nearer to the truth — Karl Popper Copy Share Image
There will be well-testable theories, hardly testable theories, and non-testable theories. Those which are non-testable are of no interest to empirical scientists.… — Karl Popper Copy Share Image
We hate the very idea that our own ideas may be mistaken, so we cling dogmatically to our conjectures. — Karl Popper Copy Share Image
The true Enlightenment thinker, the true rationalist, never wants to talk anyone into anything. No, he does not even want to convince;… — Karl Popper Copy Share Image
I think that there is only one way to science - or to philosophy, for that matter: to meet a problem, to… — Karl Popper Copy Share Image
It is clear that everybody interested in science must be interested in world 3 objects. A physical scientist, to start with, may… — Karl Popper Copy Share Image
Science may be described as the art of systematic over-simplification. — Karl Popper Copy Share Image
no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are… — Karl Popper Copy Share Image
If you know that things are bound to happen whatever you do, then you may feel free to give up the fight… — Karl Popper Copy Share Image
Science is not a system of certain, or -established, statements; nor is it a system which steadily advances towards a state of finality... And… — Karl Popper Copy Share Image
“As indicated by our example, methodological nominalism is nowadays fairly generally accepted in the natural sciences. The problems of the social sciences, on the… — Karl Popper Copy Share Image
Science is perhaps the only human activity in which errors are systematically criticized and, in time, corrected. — Karl Popper Copy Share Image
A system is empirical or scientific only if it is capable of being tested by experience. These considerations suggest that not the verifiability but… — Karl Popper Copy Share Image
Bold ideas, unjustified anticipations, and speculative thought, are our only means for interpreting nature: our only organon, our only instrument, for grasping her. And… — Karl Popper Copy Share Image
[The aim of science is] to explain what so far has taken to be an explicans, such as a law of nature. The task… — Karl Popper Copy Share Image
There can be no ultimate statements science: there can be no statements in science which can not be tested, and therefore none which cannot… — Karl Popper Copy Share Image
Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it… — Karl Popper Copy Share Image
I am opposed to looking upon logic as a kind of game. ... One might think that it is a matter of choice or… — Karl Popper Copy Share Image
The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error. — Karl Popper Copy Share Image
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