 Accordingly, Burge rejects premise (c) of the memory argument: If Oscar truly forgot nothing, then preservative memory means he knows at t2 what he knew at t1. Per Falvey &amp; Owens (1994), Oscar’s memory may not provide comparative knowledge of content, i.e., knowledge that enables armchair discriminations between water and twin water contents. But memory still preserves knowledge of his thought at t1—meaning that (c) is false. (The incompatibilist might rejoin that (c) is stipulative in the thought experiment; but in that case, Burge sides with Brueckner 1997a in rejecting (b). Yet see Schroeter 2007 for a different issue in cases where Burge rejects (c).)