The belief in a political Utopia is especially dangerous. This is possibly connected with the fact that the search for a better world, like the investigation of our environment, is (if I am correct) one of the oldest and most important of all the instincts.

The quest for precision is analogous to the quest for certainty and both - precision and certainty are impossible to attain.

No number of sightings of white swans can prove the theory that all swans are white. The sighting of just one black one may disprove it.

There is no history of mankind, there is only an indefinite number of histories of all kinds of aspects of human life.

The only way to test a hypothesis is to look for all the information that disagrees with it.

It is a myth that the success of science in our time is mainly due to the huge amounts of money that have been spent on big machines. What really makes science grow is new ideas, including false ideas.

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 is not really testable science.