" JOHN: You said “Good day.” I think that it is a nice day today.
CAROL: Is it?
JOHN: Yes, I think it is.
CAROL: And why is that important?
JOHN: Because it is the essence of all human communication. I say something
conventional, you respond, and the information we exchange is not about the
“weather,” but that we both agree to converse. In effect, we agree that we are both
human. "
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