 Suppose this is how listeners always process utterances. Then to the considerable extent that speakers can anticipate the course of such processing (what will get added to the premise set, what consequences will get drawn, what will get discarded along the way, where the break-even point will be reached), speakers can anticipate what listeners will make of their words. Yet they can’t anticipate the course or extent of listeners’ processing in complete detail, with the result that their responsibility for what a listener makes of their words, the degree to which they can be said to have vouched in advance for the results of the listener’s processing, trails off as this processing continues. Sperber and Wilson contend that this processing model accounts for standard Gricean implicatures, metaphors included, without requiring the listener to reconstruct the speaker’s precise rationale for speaking as she did and without a rich and contentious set of conversational norms.