Time Quotes by Karl Popper

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

“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

Science is perhaps the only human activity in which errors are systematically criticized and, in time, corrected.

— Karl Popper

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

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

[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

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

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

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

The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error.

— Karl Popper

Good tests kill flawed theories; we remain alive to guess again.

— Karl Popper

There is no pure, disinterested, theory-free observation,

— Karl Popper

We have the right not to tolerate the intolerant. We should tolerate even them whenever we can do so without running a great risk;…

— Karl Popper

Better our hypotheses die for our errors than ourselves.

— Karl Popper

“Every time we proceed to explain some conjectural law or theory by a new conjectural theory of a higher degree of universality, we are…

— Karl Popper