Foucault's Archeology of Silence

Derrida: You cannot speak of madness even if you are trying to mobilize it against a reason without always already speaking the language of reason. Foucault sought not to necessarily let it speak per se, he sought instead to let its silence speak. So mad people could speak in psychiatric wards as they were emerging and that speech was essentially being shot into a vacuum or into a black hole which just absorbed it. But Dereta says that as long as you're working within this logic of an archeology,you are always within or always already within a kind of domain of order and reason.