Compartmentalized mental state representations like this have been turned into semantic theories of attitude ascriptions and used to solve a variety of familiar puzzles, such as those involving Kripke’s (1979) Pierre who believes Londres is pretty but London is not (Asher 1986, Kamp 2015), Geach’s (1967) Hob who believes a witch killed his cow while Nob believes she, the same witch, blighted his mare (Asher 1987), specific indefinites (Kamp and Bende-Farkas 2019), presupposition projection out of (non-doxastic) attitude ascriptions (Maier 2015), and referring to fictional entities (Maier 2017).