Grice’s Rules Called Etiquette Against Unthought Thoughts

Tiago Pimentel posted a quote from @nsaphra stating that Grice’s rules are rules of etiquette whose unwarranted violation is rude. The post adds that readers should not be expected to welcome unthought thoughts. The comment links to the original tweet by @nsaphra. Pimentel described the quote as the best thing he had read in a while. No further details or confirmations appear in the packet.