And to do this, Derrida, as we can see, is obliged to carry out three operations: to affirm, against the whole visible economy of the text, that the power of doubt proper to madness is included, a fortiori, in the dream; to imagine (to admit that it is, despite everything, a question of madness) that it is an other who excludes madness, on his own account and according to the diagonal of an objection; and finally to remove any philosophical status from this exclusion by denouncing its naive rusticity.