Grice's Martian Chronicles

Grice converses with a Martian.

About

Martian x-s that the pillar box is red. (upper x-ing organ)
Martian y-s that the pillar box is red. (lower y-ing organ)

Grice: Is x-ing that the pillar box is red LIKE y-ing that the pillar-box is red?

Martian: Oh, no; there's all the difference in the world!