Communication and Truth

Since in Communication, an Utterance is primarily a Proposal, not a Proposition, the evaluation of it as either True or False is misplaced.  Now, a Proposal may be a threat or a promise, buttressed by concatenated causal assertions.  But, there is little evidence to indicate that either the truthfulness or their falsity of those assertions has an intrinsic relation to successful Communication.  For, on the one hand, lies can lead to adverse consequences for the addressee, thereby conducing to eventual unresponsiveness, while, on the other, as the persistent effectiveness of myth demonstrates, so long as a false statement is generally believed, it can be effective in an attempt to persuade.  So, neither Russell's claim that Truth is the highest value of Language, nor Nietzsche's challenge to it, are immediately relevant to Communication.