  Although Lewis explored various ways around this difficulty, he eventually concluded that we should alter the analysis of convention. In “Languages and Language” (1975/1983), he broadened the analysis so that regularities of action and belief could serve as conventions. Clause (4) of Lewis’s definition entails that everyone prefers to conform to the convention given that everyone else does. Preferences regarding one’s own beliefs are dubiously relevant to ordinary conversation. Thus, in his revised analysis, Lewis substitutes a new clause: