 In her defense, a compatibilist can observe that these cases are not cases of slow switching, and the usual view is that contents do not change in a “quick switch.” (Though the individuation of some cognitive processes may switch immediately; see Clark &amp; Chalmers 1998). Yet even if slow switches regularly occur, this still does not show that EXT and SK are incompatible (Warfield 1997). It might mean that EXT and SK are not jointly true in our world. Nevertheless, they still might hold in some other possible world; so no incompatibility strictly follows.