Just an article i found that id like you crazy language raping Americans to look at XD
"I could care less" vs. "I couldn't care less"
When one usually states "I could care less", they usually mean "I could not care less". [e.g. "I could care less about linguistics."]
In order for one to "care less" about a subject, they must first care about it somewhat. Saying "I could care less about ... " does indeed imply, nay dictate, that there is some degree of care.
I've put together a handy chart to help visualize...
It can easily be seen that, in absolute terms, there is no caring at the zero marker. It is impossible to care less than that amount.
Let us use a different example...
I could have less food.
I couldn't have less food.
Which statement above means "I have at least some food", and which means "I don't have any food"?
**This short video by John Cleese sums it up pretty well XD
http://funkwarehouse.com/jcpods/john-cleese-podcast-18.mp4
So in short:
"I couldn't care less" = It succinctly conveys that a person cares so little about something that they could not possibly care less. We can safely assume that whatever it is, they don’t care about it, at all.
"I could care less" = Is an American colloquialism, it's the use that has logical inconsistency rather than the phrase itself. The phrase “I could care less” taken alone, simply does not make sense if the intended implication is that you have no interest in a statement, and this is the intended implication in all the situations I’ve encountered it.
Before you go off on one it's intended as a joke with some logic thrown in XD