Abstract

Belief in malevolent global conspiracies is often treated as a defeater for philosophical seriousness. Engaging with Lee Basham's defense of conspiracy theorizing and Genia Schönbaumsfeld's critique, I make two claims. First, we must distinguish the ambitious multi-institutional schemes of non-total malevolent global conspiracies, which nevertheless remain evidentially vulnerable, from conspiracy theories that are self-sealing. Only the latter are epistemically vacuous. Second, properly understood, Cartesian doubt is a norm-governed temporary device for re-ordering reasons, a standing commitment to the view that everything can be doubted. The assumed kinship between radical skepticism and self-sealing conspiracy theories, therefore, overstates their structural similarity. Keywords: conspiracy theories, Descartes, epistemology, malevolent global conspiracy, radical skepticism, Wittgenstein