Karl Popper Theory Quotations

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.

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

No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct...

Every genuine test of a theory is an attempt to falsify it, or to refute it.

Contrary to the outstanding work of art, outstanding theory is susceptible to improvements.

Historically speaking all - or very nearly all - scientific theories originate from myths.

A theory is just a mathematical model to describe the observations.

The conspiracy theory of society... comes from abandoning god and then asking: "Who is in his place"

All we can do is search for the falsity content in our best theory.

A theory that explains everything, explains nothing

I have spoken to Einstein and he admitted to me that his theory was in fact no different from the one of Parmenides.

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