摘要：I will focus on the lexical insertion of an A-operator, generally regarded as a grammatical reformulation of the process of local accommodation (Beaver and Krahmer (2001:171). A is used as a „presupposition wipe-out device‟ in trivalent accounts of presuppositions (Peters 1979, Beaver and Krahmer 2001, Fox 2008 and George 2008). Beaver and Krahmer (2001) propose to handle cases like (1) by inserting A in both disjuncts as in (3). I will show that there are cases in which this simple account does not work and needs to be amended somehow.
