Hare knows that Grice has the key to Mode (not "Mood" -- cfr. "In the mode")

P'SYCHOLOGY AND PHILOSOPHYby RM Hare - 1967 - Cited by 28 - Related articles
Grice's recent work on what he calls 'implicatures '; and the .... The general principle is summarized by Grice, and applied to ...
www.jstor.org/stable/2251842