Quotes About Logic

For if we allow that human life is always guided by reason, we destroy the premise that life is possible at all.

Life does not listen to your logic; it goes on its own way, undisturbed. You have to listen to life.

True virtue is life under the direction of reason.

True courage is a result of reasoning. A brave mind is always impregnable.

It may be that everything the life science companies are telling us will turn out to be right, and there's no problem here whatsoever. That defies logic.

He that speaketh against his own reason speaks against his own conscience, and therefore it is certain that no man serves God with a good conscience who serves him against his reason.

It does bear emphasis that slippery-slope arguments are notoriously invalid.

One man's modus ponens is another man's reductio, as epistemologists are forever pointing out (In Critical Condition, p. 70)

One man's affirmation of the consecuent is another's man inference to the best explanation (Psychosemantics, pp. 149)

Why isn't every basic law a miracle by definition?

The question of whether machines can think is about as relevant as the question of whether submarines can swim.

The thinner the excuse, the fatter the reason for it.

Cold, dispassionate logic is admirable, but when people are starving and desperate, it's just cruel.

The only way in which the world can be grasped ultimately lies, not in thought, but in the act, in the experience of oneness. Thus paradoxical logic leads to the conclusion that the love of God is neither the knowledge of God in thought, nor the thought of one's love of God, but the act of experiencing the oneness with God.

This axiom of Aristotelian logic has so deeply imbued our habits of thought that it is felt to be "natural" and self-evident, while on the other hand the statement that X is A and not A seems to be nonsensical. (Of course, the statement refers to the subject X at a given time, not to X now and X later, or one aspect of X as against another aspect.)

Paradoxical logic was predominant in Chinese and Indian thinking, in the philosophy of Heraclitus, and then again, under the name of dialectics, it became the philosophy of Hegel, and of Marx.

Even to begin to understand the problem of faith one must differentiate between rational and irrational faith.

Why—the question on which all logic, all philosophy, all science has shattered up to now

Don't ever fool yourself that facts don't fit, if you get the right explanation. They're just like jigsaw puzzles—when you get them right, they're all going to fit together.

There is a time to silence an adversary with the honey of logical persuasion, and there is a time to silence him with the argument of a heavily directed club.

If a four-letter man marries a five-letter woman, he was thinking, what number of letters would their children be?

a man doesn't want something reasonable, but practical.

Don't ever kid yourself with too much dialectics.

Desconfío de todas las personas francas y sencillas, especialmente cuando sus historias parecen tener lógica