This debate famously, and allegedly gave rise to the often cited saying that given an infinite amount of time, six monkeys and six typewriters, the monkeys would eventually type the works of Shakespeare.
In my travels through the Worldwide Wonder Web, I found an article that describes what happens when a University gave a group of monkeys their typewriters (but not infinity, for obvious reasons - there's never enough infinity to go round) to test this theory.
Many thanks to Brad Harrub, Ph.D for presenting this info on the Interpipe:
Eventually the six monkeys—named Elmo, Gum, Heather, Holly, Mistletoe, and Rowan—did produce five pages of “text.” However, that “text” was composed primarily of the letter S, with the letters A, J, L, and M added on rare occasions. Mike Phillips noted, “They pressed a lot of S’s.” He went on to state, “obviously, English isn’t their first language.”