[whoamii]

You seem to believe idempotency is a fancy word for avoiding duplicates, which is why we seem to be having different conversations.

[stickfigure]

Idempotence is a fancy word for being able to repeat an operation without changing the outcome.

You seem to think that it's important to make the specific bytes of an http request-response idempotent.

I think that it's important to make a business operation idempotent.

You're missing the forest for the trees.