The Intractability of Reason and Madness

In both Derrida and Foucault, there is a recognition of the intractability. And by intractability, I mean the fragility or the instability of a clear distinction between reason and madness. So they both recognize that. But the way that they imagine any kind of difference is where they disagree. The only way it was possible to proffer up one set of beliefs as being like the be all and all of possible things of like knowledge depended upon the equal yet inverse, that is the equal condemnation of another body or other bodies of knowledge.