  Indexicality should be distinguished from ambiguity. Ambiguous simple expressions, such as ‘bank’ and ‘bat’, have a fixed, limited number of different meanings determined by linguistic convention. Indexicals, by contrast, seem to have a single linguistic meaning that is fixed by linguistic convention, but also another sort of meaning (content) that varies from occasion to occasion, or context to context. For instance, it seems that ‘you’ has a single meaning fixed by linguistic convention, and it is because of this fixed linguistic meaning that the sentence ‘You are hungry’ can have a virtually unlimited number of contents, in different contexts.