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If you're "Social startup of the year" it doesn't matter if one post appear to some followers 100ms later than they should be.

That's latency, not correctness. I think even "social startup of the year" cares that the post shows up at all, is attributed to the correct author, isn't corrupted somewhere and so on. Data correctness/consistency is about making sure that the data isn't in an inconsistent state.

> That's latency, not correctness.

That's "eventual consistency" in replication

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