MIRANDA ROJAS, Rafael. Identity statements, propositional invariability and contextual stipulation. []. , 14, 23, pp.105-133. ISSN 0124-6127.

If two sentences express the same proposition can be understood one as a priori, another as a posteriori; but no one as necessary and the other as contingent. This paper argues that identity statements concerning the same object express the same proposition. The epistemic difference a priori-a posteriori is not an aspect that favors what is here called propositional variability: that two identity statements do not express the same proposition. It argues that they are necessary statements, not contingent ones, so that one way to keep this is the Kripkean notion of rigidity.

: Contingent; identity statements; propositional invariability; necessity; rigidity.

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