 This idea clearly has a lot in common with the restriction on quantifier domains view. In particular, both approaches seek to show how the domain of contents expressible in contexts can expand, to account for the instability of the Liar sentence. For discussion of relations between the situation-theoretic and quantifier domain approaches, see Glanzberg (2004a). Barwise and Etchemendy discuss relations between their situation-based and a more traditional approach in 1987 (Ch. 11). For a detailed match-up between the Barwise and Etchemendy framework and a Burgean framework of indexed truth predicates, see Koons (1992).