P.A.T.E.O. Force (pick any two, eliminate one) is a method of forcing a particular object from a set of objects created by Roy Baker. It was first described in Baker's Bonanza (page 40) by Hugh Miller (1968).
It involves the spectator and magician in a rotating selecting and elimination process, leaving only one object from an unlimited number of objects.
The method may be disguised in a multitude of ways within card tricks, mentalism, stage routines, etc.