Grice's Erotetics (On the logic of "?" and "¿")

I add the brackets in case you are thinking _erotics_.

Nay. This is more akin to Grice's repeated uses of the rather ugly Latinism, 'interrogative', when 'erotetic' is so _nicer_ and OED-recognised.

(Chapman fails to note this, p. 132 -- well, she's not trying!)

Consider

"Is the cat on the mat?"

Logical form:

?p

Answer:

"No, the cat is not on the mat"

Proposed logical form -- by yours truly, who is a lifelong native on this:

¿p

Now, there are yes/no questions (or truth-value gap questions as the one on the preamble to this blog, "Is Grice the greatest philosopher that ever lived?") and there are _x_-questions:

Where is the cat?
On the mat

In symbols

(Ex)P & *Cyx (?)
¿(M)

Next.