People approach me with the oddest requests, knowing that I am a grammar Dalek. “Grammar Dalek,” they say, “could you please use your influence to set straight the English-speaking world? For example, could you please tell people to stop saying they could care less when they really mean that they could not care less?”
At questions like this I chortle—and if you have never heard a Dalek chortle, you should be thankful; it is not a pleasant sound—and when I can stop chortling I tell them, “People, I’m sorry to disappoint you, but the original expression is indeed, ‘I could care less.’ Moreover, the right and wrong of this expression were debated long before you were born, and the official decision says that you are wrong.”
The Second Intergalactic Dalek War was fought over this very expression. Daleks divided into two groups, each intensely convinced that they were right, and each determined to exterminate the Daleks who disagreed with them. The larger group of Daleks, known to Dalektic historians as the Literalists, fired the first shot. “If you could care less,” they said, “then obviously you care a little. Stop saying that you could care less if you mean that you do not care at all.”
The smaller group, called the Ironists, replied, “Actually, the expression ‘I could care less’ is shorthand for a longer expression. It really means, ‘I could care less, but the difference between how much I care now and caring not at all is so small that you could not possibly notice it, let alone measure it.’ That’s too many words to say in the midst of a conversation or an argument, so the idea is shortened to the much simpler form.”
The Literalists shot back, “But your shortened expression makes no sense. It says the opposite of what it means!”
To which the Ironists answered, “Obviously you have never encountered sarcasm before.”
The battle was fought for many centuries, and many Daleks gave their lives for their respective causes. In the end, the Ironists prevailed, and now the iron-clad expression is, as you can see, “I could care less.” From now on, when you scornfully want to tell someone how you feel about their opinion, you know exactly what to say. Say it right, or say it wrong; it doesn’t matter, and really, I could care less.