Very interesting analysis, thanks for posting. It hasn’t done a thing to change my dislike of the “could care less” construction, despite the explicatory exertions of some of the quoted linguists, especially John Lawler, but it’s an undeniably plausible explanation about how something that probably started as a mistake has endured even if its promulgators never quite understood why.
Two side comments stood out for me. One was the statement that “This makes a lot more sense than Pinker’s sarcastic teenage intonation theory.” I fully agree – it definitely does. I always thought Pinker was way off base on this.
But the other was the statement that George W Bush was one of those of the “I could care less” persuasion. Really? This is your endorsement? I think GWB is one of the strongest arguments for my position on the importance of standard English. Just a small sampling of the language evolution this linguistic genius has bestowed upon the world, celebrated, I’m sure, by descriptivists all over:
“You teach a child to read, and he or her will be able to pass a literacy test.” —Townsend, Tennessee, February 21, 2001
“They misunderestimated me.” —Bentonville, Arkansas, November 6, 2000
“Families is where our nation finds hope, where wings take dream.” —LaCrosse, Wisconsin, October 18, 2000
“I know how hard it is for you to put food on your family.” —Greater Nashua, New Hampshire, January 27, 2000
“Rarely is the question asked: Is our children learning?” —Florence, South Carolina, January 11, 2000
“I know the human being and fish can coexist peacefully.” —Saginaw, Michigan, September 29, 2000
“Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we.” —Washington, D.C., August 5, 2004