 ‘Ambiguity’, as used by philosophers of language and linguists, refers to a more specific phenomenon than that of multiple permissible interpretations. Distinguishing ambiguity from these related phenomenon can be a difficult and tendentious (and sometimes tedious!) affair. We will discuss testing for ambiguity below: for now, we will try to isolate ambiguity by separating it from other typical cases with which ambiguity is easily conflated.