 Nevertheless, the compatibilist’s opening objection lingers: Nothing yet shows that the only ways to acquire water thoughts, under EXT, are in the ways catalogued so far (Ball 2007). For all that has been shown, it remains possible that essence-agnostic Oscar is socially isolated and his water thoughts reference no natural kind. (See also Gallois &amp; Hawthorne 1996, Gallois 2008, and McLaughlin &amp; Tye 1998a, b, c.)