An appeal to truth looks unlikely to take us far in explaining differences in meaning between such near synonyms as "close" and 'shut", or "precisely" and "exactly", pairs for which the supplementary notion of tone is also unsuited. Hence, another reason for dissatisfaction with Tarski's T-sentences: across a wide range of uses intersubstitutivity has no effect on the truth of their putative meaning-giving biconditionals. True, coextensiveness is not to be taken for synonymy; yet no difference in anything like Frege's mode of presentation discriminates "Close the door" from "Shut the door".