maxim of relevance
What is the maxim of relevance?
The maxim of relevance/relation directs us to organize our utterances in such a way as to ensure their relevance to the conversational exchange. Make sure that whatever you say is relevant to the conversation at hand.
Why is it call the maxim of relevance?
If we ask someone to tell us about the story line of a movie and they tell us about how much they love the main actress in the movie; they are violating the maxim of relation because they are not sticking to the issue of relevance.
Klik here : Cooperative Priniciple