 There are further variations on these slow switch arguments. What’s more, there ends up being multiple interpretations of the initial thought experiment. (See the supplementary document,  Variations on Slow Switching,  for more details.) Nonetheless, all variations embody the same basic thought: If EXT is true, then in a slow switch Oscar cannot distinguish from the armchair a water content from a twin content. This then forms the basis for why EXT precludes SK. Given the two types of slow switch argument, note that sections  3.3  addresses only the second type, the memory argument. The remaining sections, however, plausibly have some bearing on both types of argument.