The way OP framed it IMO sounded like a very informal conversation, not a written contract with formal specifications... I think it's possible the person agreei

The way OP framed it IMO sounded like a very informal conversation, not a written contract with formal specifications... I think it's possible the person agreeing at-most-one was "ok" quite possibly didn't care either way, and might even view supporting duplicates as a positive extra feature... but I don't think this is something either of us can speak to authoritatively. > if we're positing a system on top of UDP, then it doesn't matter what the protocol is And this is still true, and neither of us know if they would have designed it this way or not, but they could.