“Fallacies do not cease to be fallacies because they become fashions.”

“Scientists rightly resist invoking the supernatural in scientific explanations for fear of committing a god-of-the-gaps fallacy (the fallacy of using God as a stop-gap for ignorance). Yet without some restriction on the use of chance, scientists are in danger of committing a logically equivalent fallacy-one we may call the “chance-of-the-gaps fallacy.” Chance, like God, can become a stop-gap for ignorance.”

“No, that is the great fallacy: the wisdom of old men. They do not grow wise. They grow careful.”

“To expect reason is where the fallacy lies.”

“The terrible, tragic fallacy of the last hundred years has been to think that all man's troubles are due to his environment, and that to change the man you have nothing to do but change his environment. That is a tragic fallacy. It overlooks the fact that it was in Paradise that man fell.”

“Philosophy is an unusually ingenious attempt to think fallaciously.”