"Jokester" is a science fiction short story by American writer Isaac Asimov.

It first appeared in the December 1956 issue of Infinity Science Fiction, and was reprinted in the collections Earth Is Room Enough (1957) and Robot Dreams (1986).

It is one of a loosely connected series of stories concerning a fictional computer called Multivac.

Noel Meyerhof is a "Grand Master", one of a small cadre of Earth's recognised geniuses, who has the insight to know what questions to ask Multivac.

They needed to isolate the responses to their jokes from original ones, so they "programmed" us to react differently to puns.