Grice on ≡

Well, not really. But my marginalia on Chapman's rather 'unrigorous' (ha) comments on the 'rigour' of philosophical analysis as concerned with

p ≡ q

e.g.

"I am sleeping" ≡ "I am experiencing a meme such that a previous meme of me was not asleep but there is a causal link connecting them" (alla Grice, "Personal Identity"

I mean rain ≡ I intend you to believe that I believe that there is some probability that you will come to believe that because I say that I mean rain by saying it you'll get a conviction not for life but towards my belief that you believe it is raining.

Chapman on the necessity and sufficiency of anallysis. Cfr. Grice, WoW v on the prongs for 'means' being either too weak or too strong. Until he pours the right amount.