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I care so much about it that I could care less than I do. But I don't. I care about it a lot.
I care so little about it that I couldn't care less.
This is going to become one of those senseless misquotes like "cheap at half the price" (should be: "cheap at twice the price") isn't it?
What is especially annoying about this is that "I could care less" is a useful phrase. Or rather, could be. It could--should--mean, "the more I hear about it, the less I care about it."
Your point is quieted. (And then it should be "muted.")
Your point does not (or no longer) applied to this situation.
A muted point is a quiet/silenced statement.
A moot point is a invalid statement.
Moot \Moot\, a. Subject, or open, to argument or discussion; undecided; debatable; mooted.
Source: Webster's Revised Unabridged Dictionary (1913)
In the context of a meeting, a point is moot if it is not relevant to the purpose of the meeting, but must be or should be decided later or elsewhere. But often, "moot" is used as if it means that the issue has already been decided by default.
There are several other definitions: Arguing a case or position, often in the sense of "practicing" to attain proficiency in the art of debate or arguing law; A meeting or assembly, as in "folk-moot" or "Ent-moot"; Presenting a point or a case for discussion.
Irregardless, a. To irrigate (e.g. to water crops or lawns) in a negligent or irresponsible manner. "Though the community was subject to water-usage restrictions because of the recent drought, he turned on his lawn sprinklers irregardless." :)