logic Quotes

My life isn’t theories and formulae. It’s part instinct, part common sense. Logic is as good a word as any, and I’ve absorbed what logic I have from everything and everyone… from my mother, from training as a ballet dancer,... ...

Demonstration is also something necessary, because a demonstration cannot go otherwise than it does, ... And the cause of this lies with the primary premises/principles.

In inventing a model we may assume what we wish, but should avoid impossibilities.

Of means of persuading by speaking there are three species: some consist in the character of the speaker; others in the disposing the hearer a certain way; others in the thing itself which is said, by reason of its proving,... ...

It is a part of probability that many improbable things will happen.

Now all orators effect their demonstrative proofs by allegation either of enthymems or examples, and, besides these, in no other way whatever.

There are, then, these three means of effecting persuasion. The man who is to be in command of them must, it is clear, be able (1) to reason logically, (2) to understand human character and goodness in their various forms,... ...

The arousing of prejudice, pity, anger, and similar emotions has nothing to do with the essential facts, but is merely a personal appeal to the man who is judging the case.

A likely impossibility is always preferable to an unconvincing possibility.

Rhetoric is the counterpart of logic; since both are conversant with subjects of such a nature as it is the business of all to have a certain knowledge of, and which belong to no distinct science. Wherefore all men in... ...