 Although a unified approach is attractive, it has come under criticism from Abbott (2003, 2008), Horn (2006) and Abbott and Horn (2011). For example, Abbott (2008) argues that the pragmatic story (in which the uniqueness of some descriptions is conversationally implicated) fails because it predicts that the uniqueness implication should be cancellable, but according to Abbott, it is not. (Here we use the hash symbol to indicate a failed implicature cancellation.)