The Elizabethan term "clown" could be applied to any simple yokel. The term ''fool" referred to a court jester often wearing motley, a kind of multi-colored and outlandish attire. Elizabethan fools were very often "naturals," simple unassuming idiots who amused the courtiers with their naiveté or misunderstanding. In Shakespeare's plays, fools arguably function as either the conscience of some basically noble but misled character (for example, in King Lear) or as a device to deflate and expose the pomposity of characters who overstep their proper positions (for example, in Twelfth Night). Additionally, Shakespeare's fools amuse with their convoluted logic and witty plays on words. In As You Like It, Touchstone, although he delights with his wit, serves a somewhat different purpose.
A "touchstone" was a stone that was used to determine if metals were precious. Rubbed against a touchstone, gold and silver would leave a distinguishable mark. ''Touchstone'' has come to signify anything that tests and reveals virtue or worth. This is the purpose Touchstone serves in the play. When he is in the company of other characters, he brings out their true virtue. For example, when he debates Corin, the audience sees the true value of Corin's simple philosophy in contrast to Touchstone's argument for argument's sake, and Corin's pastoral life seems to have real substance—it is not a life based solely on witticisms and conventional