Karl Popper

There is no knowledge without rational criticism, criticism in the service of the search for truth.

Karl Popper

The philosophical relativism that hides behind [Kant’s] “old and famous question” “What is truth?” may open the way to evil things, such as a propaganda of lies inciting men to hatred. […] Relativism […] is a betrayal of reason and of humanity.

Karl Popper

Knowledge consists in the search for truth — the search for objectively true, explanatory theories. It is not the search for certainty. To err is human. All human knowledge is fallible and therefore uncertain. It follows that we must distinguish sharply between truth and certainty. That to err is human means not only that we must constantly struggle against error, but also that, even when … [ Read more ]