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> Insanity is the wrong term, because it would imply repeating something that has already failed.

However popular that aphorism is, it isn't actually the definition of insanity.

Dogs are mammals. Mammals aren’t dogs.

'Dog' and 'mammal' are two distinct terms, 'insanity' and 'insanity' are not.

“Doing the same thing over and over again, but expecting different results” and “insanity” are also different.

The former might be a form of the latter, but you can certainly be insane in other ways.

Sure, but that wasn't what the OP said. They said:

> Insanity is the wrong term, because it would imply repeating something that has already failed.

ie suggesting the opposite of your point; that the term "insanity" is more narrowly defined rather than broadly defined.

Fair point, I deleted the sentence.