The argument from convention contends that the regular use of definite descriptions as referential devices strongly implies that a referential semantic convention underlies such usage. On the presumption that definite descriptions also participate in a quantificational semantic convention, the argument from convention has served as an argument for the thesis that the English definite article is ambiguous. Here, I revisit this relatively new argument. First, I address two recurring criticisms of the argument from convention: (1) its alleged tendency to overgenerate and (2) its apparent evidential inadequacy. These criticisms are found wanting. Second, following Zacharska (Univ Coll Lond Work Pap Linguist 22:56–63, 2010), I argue that while the argument from convention does alter the landscape of logical possibilities insofar as it provides good grounds for treating Donnellan’s (Philos Rev 75:281–304, 1966) referential–attributive distinction as having truth-conditional consequences, the argument from convention nonetheless fails to demonstrate that ‘the’ requires two lexical entries.