 This view of memory as “shifty” between different environments may be a consequence of EXT. Apparently, we can just as easily construct a Putnam-style thought experiment about Oscar’s and Twin Oscar’s memories (Ludlow 1995a; 1996; 1999;). Moreover, in the slow switch experiment, the presumption is that Oscar’s water thoughts generally change over to twin water thoughts—including whatever (first- or second-order) thoughts are stored in memory.