 Although anaphora and presuppositions (see below) are the central linguistic phenomena that may be thought to require a dynamic semantic analysis, in principle any aspect of the context could be the target of a phenomenon that warrants a dynamic analysis of interpretation. Barker’s 2002 treatment of the information provided by vague statements is illustrative. Barker assumes that contexts contain precise standards for vague adjectives like tall. A sentence like  (19)  can then be used in two distinct ways.  (19)  John is tall. If the information state contains precise (enough) information about what counts as tall, then an utterance of  (19)  may be used to provide information about John’s height. If, however, the hearer has no idea about the appropriate precisification of an expression like tall (say, s/he is an alien or a foreigner), but s/he does have information about John’s height, then  (19)  can be used to provide information about the standard.