Agree with the framing: in payments/telecom, reliability is often achieved via fault tolerance + reconciliation more than “perfect correctness.”
My point is narrower: those mechanisms still benefit from making illegal transitions unrepresentable (e.g. explicit state machines) so your retries/idempotency don’t create new failure modes. It’s not correctness vs tolerance, it’s correctness inside tolerant designs.
My point is narrower: those mechanisms still benefit from making illegal transitions unrepresentable (e.g. explicit state machines) so your retries/idempotency don’t create new failure modes. It’s not correctness vs tolerance, it’s correctness inside tolerant designs.