ullanta
Veteran
Or as the linguists say, there is a constant interplay between "langue" and "parole"... langue being the formal definition of a language, and parole being the stuff spoken by real people on the street. Langue guides parole, but parole eventually shapes langue. Many principles guide (or are derived from) how this happens (such as linguistic efficiency)... but for us to communicate we need both the sticklers and the people who like to play with the rules. I'm not sure that the people who just don't care make a big difference...I am a stickler for language, but I might debate that we are devolving. Language is constantly in flux. I think we are talking about two different, but related, things.
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...and, who can really distinguish between evolution and devolution in the short run?