Quotes about Logic

It was easier to know it than to explain why I know it. If you were asked to prove that two and two made four, you might find some difficulty, and yet you are quite sure of the fact.

The question now was, who was the man, and who was it brought him the coronet? "It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth.

It is easy to understand that in the dreary middle ages the Aristotelian logic would be very acceptable to the controversial spirit of the schoolmen, which, in the absence of all real knowledge, spent its energy upon mere formulas and words, and that it would be eagerly adopted even in its mutilated Arabian form, and presently established as the centre of all knowledge.

Nothing is without a reason why it is rather than it is not

There are no contradictions. If you find one, check your premises.

Arbitrary rules teach kids discipline: If every rule made sense, they wouldn't be learning respect for authority, they'd be learning logic. So go crazy with the rules?the time your child spends trying to figure them out is time he won't be stapling firecrackers to the neighbor's dog.

In conclusion, rapid space travel and travel back in time can't be ruled out according to our present understanding. They would cause great logical problems, so let's hope there's a Chronology Protection Law to prevent people going back and killing their parents.

Scientific questions cannot be decided by majority vote in any case.

Logic cannot comprehend love; so much the worse for logic.

This dictate of common sense.

Bonhoeffer had always struggled with the "problem" of being charming. He mistrusted it and wanted the words and logic of what he said to be the only things to which others responded.

Bonhoeffer openly thought things through and taught his students to do the same. They followed lines of reasoning to their logical conclusions and considered every angle to have a sense of absolute thoroughness, so that nothing depended on mere emotion.