Emotions Are Concepts 1. There are alternative futures A and B, A is made the present, meaning A is chosen
2. Then there is the question "What was it that made the decision turn out A?"
3. Then the answer is a choice between subjective words X and Y
4. Where either answer X or Y is equally valid, but a forced answer X or Y is invalid.
It means that emotions can only be identified by spontaneous expression of emotion with free will, resulting in an opinion on what the emotions are. As well someone's own emotions, as someone else's, can only be identified with a chosen opinion.
So if someone chooses A, then you can express a chosen opinion that he chose A out of fear, jealousy, lust, hate, love, joy etc. And any answer would be equally logically valid.
Some answers may then in turn be judged (with a chosen opinion) as weird, mean, unfair, stupid, but it is not actually a logical error to be weird mean unfair and stupid.
The subjective spirit (emotions), chooses which way the objective material turns out.
So actually the original poster saying that anger is a varying set of behaviors is error, because then one is forced to conclude it is anger if the behavior corresponds with the definition of angry behavior. Forced opinions are a logic error, because basically they assert that a choice is free and forced, which is an error of contradiction.
But one can first judge a general behavior to be an expression of anger, like stomping feet, so then you have a preformed judgment. Then when someone stomps their feet, you only have to decide if or not to follow your preformed judgment.
That's basically how the laws in court work, they are preformed judgements about what's right and wrong.