  Perlocutions are characteristic aims of one or more illocution, but are not themselves illocutions. Nevertheless, one speech act can be performed by means of the performance of another. For instance, my remark that you are standing on my foot is normally taken as, in addition, a demand that you move; my question whether you can pass the salt is normally taken as a request that you do so. These are examples of so-called indirect speech acts (Searle 1979). Phrases that are commonly used in service of indirect speech acts are, ‘Would you mind terribly if I…,’ ‘Might I suggest…,’ and ‘It seems to me that…’, or simply ‘please’, as in ‘Can you pass the salt, please?’ Observe that this last sentence, with its appended tag-question, cannot be interpreted as a request for information (about the addressee’s salt-passing abilities), but can only be understood as a request. Asher and Lascarides (2001) provide a formal model of indirect speech acts on which some are conventionalized while others require Gricean reasoning for their interpretation.  