This paper gives a detailed introduction and discussion on a heated debate in2009-2010 among linguists from different schools and background targeting the influential paper by Evans and Levinson(2009),with a focus on universality and diversity of language.Functional typologists,with the availability of more and more cross-linguistic data,hold that languages in the world are inherently diversified,such that there are no significant universal properties shared among all languages,contrary to generative linguists' belief.Such controversy arises mainly from their different notions of what count as...