We all know that word meanings and usage change over time (though not all of us are happy about it). How long does a word have to be used in a particular way for that usage to be "okay"? At what point does it become "correct usage" and what determines that?
(It's hard to come up with an example that doesn't sound like peeving, so I'm making up a word.) If, for example, I started using the word "disregardless," most people would regard that as "wrong" or at least "not a real word." How many other people would have to use "disregardless" regularly for it to become an accepted word in the language? Does it matter if it's spoken or written? Does the "quality" of the speaker matter? (If the President uses the word, does that increase its "correctness" more than, say, when Bart Simpson uses it?) Is there a tipping point where a word goes from "made up" to "real" in the world at large, or is acceptance a gradual process throughout?