 Giving an account of ambiguity (and disambiguation) requires one to discern the bearer(s) of ambiguity. Propositions, for example, are presumably unambiguous (since they are meanings they can’t be subject to further considerations of meaning). This leaves a range of potential objects: utterances, utterances relative to a context, sentences, sentences relative to a context, discourses, inscriptions…. The differences aren’t trivial: a written down sentence corresponds to many possible ways of being uttered in which features such as prosody can prevent certain meanings that the written down sentence seems capable of enjoying. Two written utterances may sound the same (if they contain words that sound alike) without being spelt alike (if the words aren’t co-spelled) thus resulting in phonological ambiguity without corresponding orthographic ambiguity.  I’m going to (somewhat perversely) simply use ‘sentence’ and ‘phrase’ ambiguously, and I will attempt to disambiguate when necessary. We will also look briefly at the application of ambiguity to discourse transitions. 