identical proposition

identical proposition

n
(Logic) logic a necessary truth, esp a categorial identity, such as whatever is triangular has three sides
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would express an identical proposition, and we can and do, on occasion, decide the truth of a single proposition.
One familiar way to make this idea precise is to claim that "It is true that S" and "S" express identical propositions -- that there is no difference in content between a sentence and its truth ascription.
Truth, however, is redundant: a sentence and its truth ascription express identical propositions or thoughts.
If the challenge cannot be met, then we are invited to conclude that truth has no content -- that a sentence and its truth ascription express identical propositions, and, hence, that truth is redundant.
More generally, it is a presupposition of adopting a propositional attitude (and, indeed, of rationality itself) that the adopted tion express identical propositions, and, hence, that truth is redundant.
It is also possible that the repetition of identical propositions served specific purposes, and, therefore, is not redundant.