 Because of cases like this, it seems that regularities in meaning and belief are not sufficient to ground an analysis of meaning. For this reason, many proponents of a mentalist analysis of meaning in terms of belief have sought instead to analyze meaning in terms of conventions governing such regularities. Roughly, a regularity is a matter of convention when the regularity obtains because there is something akin to an agreement among a group of people to keep the regularity in place. So, applied to our present example, the idea would be (again roughly) that for a sentence S to express a proposition p in some group is for there to be something like an agreement in that group to maintain some sort of regularity between utterances of S and agents’ believing p. This seems to be what is lacking in the example described in the previous paragraph.