Curiously, Derrida, by imagining this other objecting and naive voice behind Descartes' writing, has swept away all the differences in the text; or rather, by effacing all these differences, by bringing together so closely the test of madness and the test of dreaming, making the one the pale and failed draft of the other, and by reabsorbing the insufficiency of the first into the universality of the second, Derrida was pursuing the Cartesian exclusion.