"On the face of it, this claim [i.e., Derrida's thesis that speech is privileged over writing] is bizarre. The distinction between speech and writing is simply not very important to Plato, Aristotle, Aquinas, Descartes, Kant, Spinoza, Leibniz, Hume, etc. And of these listed, the only one about whom Derrida offers any evidence for the privileging of the spoken is Plato, who, in Phaedrus, made a few remarks about the impossibility of subjecting written texts to interrogation. Plato points out, correctly, that you can ask questions of a speaking person in a way that you cannot of a written text. On Derrida's account, however, it is essential not only to Husserl, but to philosophy, and indeed to "the history of the world during an entire epoch," including the present, that speech should be mistakenly privileged over writing. If Derrida's claim were to be taken at its face value, I believe that a contrary argument could be given equal or even greater plausibility. From the medieval development of Aristotle's logic through Leibniz's Characteristica Universalis through Frege and Russell and up to the present development of symbolic logic, it could be argued that exactly the reverse is the case; that by emphasizing logic and rationality, philosophers have tended to emphasize written language as the more perspicuous vehicle of logical relations. Indeed, as far as the present era in philosophy is concerned, it wasn't until the 1950s that serious claims were made on behalf of the ordinary spoken vernacular languages, against the written ideal symbolic languages of mathematical logic. When Derrida makes sweeping claims about "the history of the world during an entire epoch," the effect is not so much apocalyptic as simply misinformed."