Logic and Persuasion

Insofar as the Philosophy of Language studies, as has been proposed here, successful Communication, Rhetoric is the branch of it concerned with the means to that success, i. e. with the art of Persuasion, considered by Aristotle, at least, a branch of Philosophy.  Now, a species of Persuasion is the Logical Argument, on the basis of which one Russell-Wittgenstein debate can be formulated as whether or not Logical criteria should be the standards of Rhetoric.  But, given the actuality of, in comparison with threats and promises, how unpersuasive the Logical Argument has historically and pervasively been, that dispute seems academic, in both senses of the term.  In other words, the Investigations is less an exposure of the hubris of Logicism, as Wittgenstein seems to intend, then a mockery of its vicariousness.