H. P. Grice on C. L. Stevenson on the expression-communication distinction

commūnĭcātĭo , ōnis, f. communico (several times in Cic., elsewh. rare),

I.a making common, imparting, communicating.

I. In gen.: “largitio et communicatio civitatis,” Cic. Balb. 13, 31: “quaedam societas et communicatio utilitatum,” id. Fin. 5, 23, 65: “consilii,” id. Fam. 5, 19, 2: “sermonis,” id. Att. 1, 17, 6: criminis cum pluribus, Tiro ap. Gell. 7, 3, 14: “nominum,” i. e. the like appellation of several objects, Plin. 24, 14, 80, § 129: “juris,” Dig. 23, 2, 1: “damni,” ib. 27, 3, 1, § 14.—

II. In rhet., a figure of speech, = ἀνακοίνωσις, in accordance with which one turns to his hearers, and, as it were, allows them to take part in the inquiry, Cic. de Or. 3, 53, 204; Quint. 9, 1, 30; 9, 2, 20 and 23.

Note Cicero's connection of it with "anakoinosis." The idea of the 'common' is crucial

"Anakoinosis" is a figure of speech discussed by Cicero, where the utterer displays a figure 'in accordance with which the utterer turns to his addressee, and, as it were, allows his utterer to take part in whatever it is that the utterer is engaged.

Grice finds Stevenson's appeal to 'communication' circular, or not helpful, in "Meaning."