Full Idea
In Grice's theory if a sentence is trivially true, asserting it would violate the maxim of quantity. For Stalnaker, if p is trivially true, it involves no update to the context-set, and is thus pointless.
Gist of Idea
The infelicitiousness of trivial truth is explained by uninformativeness, or a static context-set
Source
Ofra Magidor (Category Mistakes [2013], 5.2)
Book Reference
Magidor,Ofra: 'Category Mistakes' [OUP 2013], p.112
A Reaction
'Let us remind ourselves, before we proceed, of the following trivial truth: p'.
Related Idea
Idea 10991 Key conversational maxims are 'quality' (assert truth) and 'quantity' (leave nothing out) [Grice, by Read]