[gpvos]

The point is that "correct usage" is not defined by logicians or etymologists or any kind of authority, but by society as a whole, and therefore has no one exact definition. Look up "literally" in any recent dictionary for proof.

[teach]

And the misuse of 'literally' as a generic intensifier isn't even recent. It dates back[0] to the late 1600s.

[0] http://www.slate.com/articles/life/the_good_word/2005/11/the...