  In an attempt to systematize and deepen Austin’s approach, Searle and Vanderveken 1985 distinguish between those illocutionary forces employed by speakers within a given linguistic community, and the set of all possible illocutionary forces. While a certain linguistic community may make no use of forces such as conjecturing or appointing, these two are among the set of all possible forces. (These authors appear to assume that while the set of possible forces may be infinite, it has a definite cardinality.) Searle and Vanderveken go on to define illocutionary force in terms of seven features, namely: