Searle has criticized Derrida's claims of historical opposition to phonocentrism. Searle believes that many philosophers, including Aristotle, Gottfried Leibniz, Gottlob Frege, and Bertrand Russell, have "tended to emphasize written language as the more perspicuous vehicle of logical relations."[2] He argues that support for ordinary speech over written language only emerged in the 1950s with the advent of Ordinary language philosophy.