Pragmatic rules of conversation lead us to expect our conversational partners to conform to all of the following EXCEPT ______.

A) truthfulness
B) relevance
C) grammatical correctness
D) brevity

Pragmatic rules of conversation, as outlined in Grice's cooperative principle, include maxims such as quality (truthfulness), relevance, manner (which can include being brief), but they do not specifically require grammatical correctness. This is because effective communication can occur even with grammatical errors, as long as the other pragmatic rules are followed.