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Ludwig Wittgenstein

"Logic must look after itself. In a certain sense, we cannot make mistakes in logic."

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"Logic must look after itself. In a certain sense, we cannot make mistakes in logic."

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Donna Grant

"We seldom make logical mistakes, but often have mistaken logics."

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Donna Grant

"A thousand minus one is never a thousand."

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Donna Grant

"In order to disprove the assertion that all crows are black, one white crow is sufficient."

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Donna Grant

"I was upset. I had always believed logic was a universal weapon and now I realized how its validity depended on the way it was employed."

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Donna Grant

"A narrow hallway is all that separates rational from irrational, creativity from insanity, and intelligence from stupidity."

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Donna Grant

"The existence of a majority logically implies a corresponding minority."

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Donna Grant

"Many people have said to me that I'm a mystic. I find that a bit mysterious. I just use logic and common sense for my philosophies."

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Donna Grant

"Arguments cannot be answered by personal abuse; there is no logic in slander, and falsehood, in the long run, defeats itself."

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Donna Grant

"Logic, n. The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding. The basic of logic is the syllogism, consisting of a major and a minor premise and a conclusion - thus:Major Premise: Sixty men can do a piece of work sixty times as quickly as one man.Minor Premise: One man can dig a post-hole in sixty seconds; Therefore-Conclusion: Sixty men can dig a post-hole in one second.This may be called syllogism arithmetical, in which, by combining logic and mathematics, we obtain a double certainty and are twice blessed."

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Donna Grant

"Pattern Thinking is a type of problem-solving thinking."

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Ludwig Wittgenstein
"Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness."

Humor

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Ludwig Wittgenstein
"You learned the concept 'pain' when you learned language."

Language

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Ludwig Wittgenstein
"It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise."

Philosophy

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Ludwig Wittgenstein
"Our greatest stupidities may be very wise."

Intelligence

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Ludwig Wittgenstein
"The face is the soul of the body."

Soul

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Ludwig Wittgenstein
"Philosophy is not a theory but an activity."

Philosophy

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Ludwig Wittgenstein
"If a lion could talk, we could not understand him."

Talk

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Ludwig Wittgenstein
"Philosophy is like trying to open a safe with a combination lock: each little adjustment of the dials seems to achieve nothing, only when everything is in place does the door open."

Nothing

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Ludwig Wittgenstein
"Logic must look after itself. In a certain sense, we cannot make mistakes in logic."

Logic

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Ludwig Wittgenstein
"Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental."

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