 Perhaps the architectural analogy breaks down in a manner that serves Descartes well. For though there is no most-powerful literal bulldozer, perhaps epistemic bulldozing is not subject to this limitation. Descartes seems to think that there is a most-powerful doubt – a doubt than which none more hyperbolic can be conceived. The Evil Genius Doubt (and equivalent doubts) is supposed to fit the bill. If the method reveals epistemic ground that stands fast in the face of a doubt this hyperbolic, then, as Descartes seems to hold, this counts as epistemic bedrock if anything does.