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Yes, you can have exactly-once delivery

Introduction This post is ostensibly about an obscure technical issue in distributed systems, but it's really about human communications, an...

Like hitting yourself in the head with a hammer, this is an option you can undertake, but it's not very useful, and so asking someone to actually spend brain cycles considering it can't be anything more than a deliberate attempt to waste their time or insult their intelligence. This post was intended to be about human communication more than distributed systems or network protocols, so I want to address one last question: How did this myth of the impossibility of exactly-once delivery get so firmly established? But I've thought about it, and I've done some research, and I'm able to account for all the data, so I'm casting my lot and publishing this, fully aware of the possibility that someone might point something out in the comments that will make me slap myself on the forehead and go "duh".

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