http://en.wikipedia.org/wiki/Colorless_green_ideas_sleep_
furiously The purpose of Chomsky’s “Colorless green ideas sleep furiously” was not to demonstrate that it was possible to construct a meaningless, though still grammatically correct sentence, but to show that the Markov Chain model of language was incorrect via the example of two similar but equally improbable sentences, one of which was grammatically correct, and the other not. 21:15