If I am correct, the opposite of 'A' is not 'B', 'C', 'D', etc., but rather, the

If I am correct, the opposite of 'A' is not 'B', 'C', 'D', etc., but rather, the

If I am correct, the opposite of 'A' is not 'B', 'C', 'D', etc., but rather, the opposite of 'A' is 'not-A.' Likewise, the opposite of 'Green' is not 'Blue', 'Orange', etc., but rather, the opposite of 'Green' is 'not-Green.' And the opposite of 'Dog,' is not 'Cat' or 'Whale,' but rather, the opposite of 'Dog' is 'not-Dog.' And so on. However, each letter 'B' through 'Z' is not 'A' (after all, it seems, 'B' is not 'A', 'C' is not 'A'. and so on). Does that mean that 'not-A' is, or can be, or includes 'B' through 'Z'? Thus, does that mean that the opposite of 'A' is or can be 'B', 'C', etc.? Logically, I suppose, letters can stand for anything -- so perhaps 'A' is or can be equal to, say, 'B' and, therefore, 'not-A' would be equal to 'not-B,' so the opposite of 'A' might be 'not-B'. But what about objects that are not logical symbols? Cats and whales or not dogs. So, if the opposite of 'dog' is 'not-dog', and if cats and whales are not dogs, then are cats and whales the opposite of dogs? Am I missing something altogether?

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