Dire et penser dans le principe psychologique de non-contradiction d'Aristote
A paralogism seems to occur in Aristotle's demonstration of the psychological principle of non-contradiction; from a performative principle of assertion, viz. saying something amounts to believe it, a modern approach leads us to claim that Aristotle assumes a referential transparency of belief opaque contexts in order to correlate the psychological and logical versions of non-contradiction. We attempt to reconstruct the proof of the principle (I). By means of the modern formalization, we apply this explanation to a couple of paradoxes (II). We conclude from this the nature of non-contradictoriness (III), before proposing a syntactic "dissolution" of the problem of referential opacity in the context of propositional attitudes. Such a dissolution leads to a skeptic stance towards the formal treatments of intentionality.