Assent, Dissent, and Rhetoric in Science

Abstract

Socrates, of course, does not mean to venerate the art of discourse here. He is telling Phaedrus that there is discourse and there is truth. Once you have gone out and dug up the truth somewhere else, you apply the art of discourse to it and fashion a persuasive argument that will permit others to partake also of the truth. Two immediate implications follow from Socrates' position. First, only when the art of discourse, rhetoric, is put to the task of selling truth to the benighted does it become "real." Second, rhetoric is necessary in human affairs just to the extent that humans are unable to apprehend truth directly. It is an unfortunate evil, required because we are rationally degenerate creatures. Both positions have remained very popular over the intervening two millenia. Bitzer, for instance, can still say that "in the best of all possible worlds there would be communication perhaps, but not rhetoric;"'I we get our truth and knowledge somewhere else, and only our lack of perfection prevents us from casting rhetoric out of the garden. But there is an important lesson in those two millenia that can help us to see the Spartan's words in another light: the sources of truth which rhetoric has been obliged to serve have changed dramatically-from Socrates' dialectic and Aristotle's apodeixis, to Christianity's biblical exegesis and divine revelation, to the current authority on matters of knowledge and truth, Science. This rotation of leading roles while the supporting actress, Lady Rhetoric, remains constant indicates that the real art of discourse is connected with truth not because of human degeneracy, but because of precisely the reverse, because of our spark of perfection, because we are truth-seeking, knowledge-making creatures who sometimes get it right. We occasionally do something important with rhetoric: we find truth and we build knowledge out of it. When we manage the trick, though, we are so eager to dissociate it from all the foul and inane things we also do with rhetoric that we give the process another name. But these other names are clearly just aliases for rhetoric, or for some subset of rhetorical interests. Dialectic, for instance, is essentially questing debate. Apodeixis is distinguished only by the level of rigor Aristotle demands of the argumentation, not by any qualitative difference. Exegesis is rhetorical analysis. The only possible gap to this pattern is divine revelation, whose capacity to generate truth I will leave to more knowledgeable commentators, pausing only to notice that, true or not, reports of revelation usually involve a fair amount of persuasive machinery-burning bushes, hovering spirits, and the like. In any case, science is certainly no exception.