"If I couldn't care less about something, that implies I do not care about it at all. In contrast to this, to my mind the phrase "could care less" seems to indicate "I do care about this to some degree at least", but that's definitely not the meaning intended."
Correct me on my own book and I'll kill you with my grammar skills.
Btw, copied it from Google because I couldn't figure out how to put it into words.
