(It's cheap, not cheep)

Tell and Ask seem to be more compatible than Ask and Guess. I have no intuition for how compatible Tell and Guess are. I think Ask is cheaper for the teller than Guess is (in Guess, you have to formulate a plausible sentence that contains a subtle request, unless you want to force the receiver).

I really like the idea of Tell on a date; I think it's already somewhat present in the rationalist meetup I attend.