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> My understanding of the FLP result is that it only applies to algorithms without timeouts.

No, I don't think timeouts help. What does timeout mean here? You've sent a message and didn't get a response. If you timeout, did they receive the message or not?

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Aye. Timeouts cannot save you from the recursive ack problem.

I believe the parent is thinking of the fact that FLP applies only in an "asynchronous" system in which messages may take infinite time to arrive, and without regard to sending order.

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