Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program,… — Karl Popper Copy Share Image
I have spoken to Einstein and he admitted to me that his theory was in fact no different from the one of… — Karl Popper Copy Share Image
Historically speaking all - or very nearly all - scientific theories originate from myths. — 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
A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people… — Karl Popper Copy Share Image
In point of fact, no conclusive disproof of a theory can ever be produced; for it is always possible to say that… — Karl Popper Copy Share Image
The Conspiracy Theory of Society... [is] a typical result of the secularization of a religious superstition. The belief in the Homeric gods… — Karl Popper Copy Share Image
I have come to the conclusion that Darwinism is not a testable scientific theory, but a metaphysical research programme... — Karl Popper Copy Share Image
Why do I think that we, the intellectuals, are able to help? Simply because we, the intellectuals, have done the most terrible… — 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
Astrologers were greatly impressed, and misled, by what they believed to be confirming evidence-so much so that they were quite unimpressed by… — Karl Popper Copy Share Image
If we are uncritical we shall always find what we want: we shall look for, and find, confirmations, and we shall look… — Karl Popper Copy Share Image
The conspiracy theory of society... comes from abandoning god and then asking: "Who is in his place" — Karl Popper Copy Share Image
But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And… — Karl Popper Copy Share Image
The old scientific ideal of episteme - of absolutely certain, demonstrable knowledge - has proved to be an idol. The demand for… — Karl Popper Copy Share Image
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the… — 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 scientific tradition is distinguished from the pre-scientific tradition by having two layers. Like the latter, it passes on its theories; but… — 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
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
Every genuine test of a theory is an attempt to falsify it, or to refute it. — 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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