"I could care less" -- what is this mystery?

[Gray]

I recently came across an article (http://www.boston.com/bostonglobe/ideas/articles/2010/10/24/i_could_care_less/?page=full)
on usage of "I could care less"

The article suggests that both of these mean the same --

"I could care less"

"I couldn't care less"

Can someone please shed some light on --

What does this sentence mean?

Why these apparently different sentences mean the same?

-gray
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First lesson - English, not english. I, not i. ~A student of English

[Thredder]

Ha, good question.
As far as I know, some people (mostly Americans) say "I could care less" when they obviously mean "I couldn't care less."

So, they are both used...but only one of them actually makes sense.

see more here -

[Alan]

Hi,

The reason as I see it is that 'I could care less' is meant in a sarcastic way - you could say this where the underlying meaning is 'as if I could care less'.

Alan
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English as a Second Language
You can read my ESL story Present Simple

[Gray]

Hi,

It is still not clear to me :(
Can we have some (conversation) examples to demonstrate the actual usage?

Thank you so much ThredderAlan for quickly replying to this topic.
_________________
First lesson - English, not english. I, not i. ~A student of English