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TheOtherDave comments on Open Thread for February 18-24 2014 - Less Wrong
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Is anyone else bothered by the word "opposite"?
It has many different usages, but there are two in particular that bother me: "The opposite of hot is cold" "The opposite of red is green" Opposite of A is [something that appears to be on the other side of a spectrum from A]
"The opposite of hot is not-hot" "The opposite of red is not-red"
Opposite of A is ~A
These two usages really ought not to be assigned to the same word. Does anyone know if there are simple ways to unambiguously use one meaning and not the other that already exist in English?
(Basically, are there two words/phrases foo and bar so that one could say "The foo of hot is cold, but the bar of hot is not-hot")
I sometimes use "negation of X" to refer to the logical operator NOT-X.
The other-side-of-a-continuum relationship I don't have a single word for. I might say that the "complement" of green is red, but that's specific to color. I often use "opposite" when I want a generic term here, with the understanding that I'm using it colloquially.