Source? If this was accepted by anyone, it was a dimwit lefty. "Could care less" is nonsensical in the context that is is usually used.

The meaning is crystal clear:

Could care less = There are things I might care less about than this

Couldn't (could not) care less = There's nothing I could possibly care less about than this.

When people say this, they usually mean the 2nd one. "This thing is so unimportant, I couldn't care less about it"

Source? If this was accepted by anyone, it was a dimwit lefty. "Could care less" is nonsensical in the context that is is usually used.

The meaning is crystal clear:

Could care less = There are things I might care less about than this

Couldn't (could not) care less = There's nothing I could possibly care less about than this.