avoiding conversational implicature

[William Mann]

Marta:

There are plenty of varieties of written text that routinely avoid the
Cooperative Principle and others.  Many sorts of legal documents do:
laws, patents, sales contracts, insurance policies  -- more generally
text written to establish rights, and text for which the effects depend
on legal precedents, prior use of the same words in laws or court cases,
for example.

Orally, there are the airline safety announcements, that seem to try to
straddle the fence.

Poetry, in my experience, often gains effect by deviating from the
maxims.

Songs also, in similar ways.

I think the list could be extended.

Bill Mann