 Employing what Kant (1781, A351) famously dubbed the “Achilles argument,” Clarke claims that the essential unity of consciousness is incompatible with the divisibility and composability of matter, because the consciousness must be distributed among the various component parts, rendering each part conscious. Clarke is not clear on what exactly it is about consciousness that requires this unity (Rozemond 2003, 175–177). Officially, consciousness is a reflexive act in which I recognize my thoughts as my own and is therefore prior to memory, although Clarke sometimes writes “consciousness” when he seems to mean “memory” (Thiel 2011, 231).