"Contrariwise, if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."

Logic,

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"Contrariwise, if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."

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William of Occam, English Philosopher

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Stephen Cole Kleene, American Mathematician

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Albert Camus, French Philosopher

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Samuel Johnson, English Author

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Harper Lee, American Novelist

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"2 + 2 equal 4... so far I don't think it will change to 5 or 6, it's near to fact, but the probability of the ability... equals not a fact!"

Deyth Banger, American Blogger

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"Logic is the art of non-contradictory identification. A contradiction cannot exist. No concept man forms is valid unless he integrates it without contradiction into the total sum of his knowledge. To arrive at a contradiction is to confess an error in one's thinking, to maintain a contradiction is to abdicate one's mind and to evict oneself from the realm of reality."

Ayn Rand, Russian Writer

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Explore more quotes by Lewis Carroll

"She who saves a single soul, saves the universe."

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"That's the reason they're called lessons, because they lesson from day to day."

Lesson

"Speak in French when you can't think of the English for a thing--turn your toes out when you walk---And remember who you are!"

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"If you drink much from a bottle marked 'poison' it is certain to disagree with you sooner or later."

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"Would you tell me, please, which way I ought to go from here?""That depends a good deal on where you want to get to.""I don't much care where """Then it doesn't matter which way you go."

Life

"When I use a word,' Humpty Dumpty said in rather a scornful tone, 'it means just what I choose it to mean - neither more nor less.''The question is,' said Alice, 'whether you can make words mean so many different things.''The question is,' said Humpty Dumpty, 'which is to be master - that's all."

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"Tweedle Dum and Tweedle Dee Agreed to have a battle For Tweedle Dum said Tweedle Dee Had spoiled his nice new rattle."

Nonsense

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Knowledge

"'But I don't want to go among mad people,' said Alice. 'Oh, you can't help that,' said the cat. 'We're all mad here.'"

People

"Contrariwise,' continued Tweedledee, 'if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."

Philosophy