| 21. | It seems a tautology, but it is not.
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| 22. | Thus by definition our formula is not a tautology.
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| 23. | Many tautologies of classical logic can no longer be proved within intuitionistic logic.
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| 24. | "Survival of the fittest " is sometimes claimed to be a tautology.
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| 25. | Indeed, south of the tautology, " Mains of X farm ".
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| 26. | I don't think " truth " would qulify as a tautology.
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| 27. | Thus the statement " truth is not a lie " is a tautology.
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| 28. | :: It would appear to be a tautology.
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| 29. | What exactly are you saying is the tautology here?
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| 30. | The basic problem with that tautology is obvious.
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