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Oreoracle
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Self-contradictory statements are not tautologies. In fact, it’s closer to the opposite: loosely, a tautology is a proposition that is true no matter what the value of the variables are, i.e, it is true under every possible interpretation. An obvious tautology would be “x=x,” since x is equal to itself no matter what its value is.Other than a tautology (a sentence that contradicts itself)…
As it’s been pointed out, the liar paradox (“This statement is false.”) lacks a truth value because it is self-referential, not because it is self-contradictory. Self-referential statements are essentially unverifiable, as they address nothing but themselves. For example, even if the statement read “This statement is true.” the truth of the statement is all that is being asserted when we say it is true. Because of this, the statement is meaningless.