Comment by tacitusarc

I appreciate the insights here, but I am struggling to understand how “exactly one” can equate to “eliminate duplicates”. Let’s say someone arrived at my house and cut my grass, and I failed to confirm they had done so, so the company sent someone over to cut my grass again, maybe multiple times. It seems silly to claim my grass was cut exactly once, despite it consistently remaining at the same height. Obviously it was cut multiple times, just not with much effect after the first. The point of exactly-once is that the server and client don’t need to expend pointless effort on duplicates… right?