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In this essay, I would like to contribute to an correct understanding of Quine’s use of the truth predicate in the formulation of logical laws. The issue at stake is central: since “logic chases truth up the tree of grammar” by generalizing over sentences instantiating the same logical structure by means of the truth predicate, to commit a misunderstanding on this point is to render oneself unable to adequately understand the internal relation between logic and truth. The method adopted in this essay consists in correcting some widespread confusions about the relation between logic, truth, and semantic ascent.