A system is empirical or scientific only if it is capable of being tested by experience. These considerations suggest that not the… — 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
I have insisted that we must be tolerant. But I also believe that this tolerance has its limits. We must not trust… — 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
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
If we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed,… — Karl Popper Copy Share Image
Genuine philosophical problems are always rooted outside philosophy and they die if these roots decay. — 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
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
Unlimited tolerance must lead to the disappearance of tolerance. If we extend unlimited tolerance even to those who are intolerant, if we… — Karl Popper Copy Share Image
It is easy to obtain confirmations, or verifications, for nearly every theory-if we look for confirmations. Confirmations should count only if they… — Karl Popper Copy Share Image
Appealing to his [Einstein's] way of expressing himself in theological terms, I said: If God had wanted to put everything into the… — Karl Popper Copy Share Image
I remained a socialist for several years, even after my rejection of Marxism; and if there could be such a thing as… — Karl Popper Copy Share Image
If we wish our civilization to survive we must break with the habit of deference to great men. — 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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