|Conventions: Conventions are agreements on approval and disapproval of actions that may have been made explicitly once, but have evolved over time to a more or less unconscious basis for the coordinated action of most members of a group or society. These conventions, on the other hand, lead to the expectation of certain consequences of actions.|
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Meaning/convention: it may be that someone who has changed a habit falls back into the old habit. Even in non-verbal cases.
I 2 f
Deviations/communication: Deviations must have good reasons.
I 419 f
Conventions (Walker, Grice Doc 10): you can not find out whether a statement transmits a relationship betw antecedent and consequent due to a special convention or whether this relationship is transmitted conversationally
H. Paul Grice
Handlung, Kommunikation, Bedeutung, Hg. Georg Meggle Frankfurt/M. 1993