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On the fifth of August 2024, mid-cascade, Chainlink's ETH/USD feed published a single number for the whole market to act on.

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Underneath it, thirty-one nodes had each reported their own, decoded here from the NewTransmission log at block 20,458,998.

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They spread 868 basis points. Six were more than 200 from the median. The feed keeps the median and throws the rest away.

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SELISIH writes every reading as its own entity, under its own key. The same query now returns the disagreement itself.

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The outlier is not flagged by us. It is named by its creator, which cannot be edited or handed to anyone else.

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The median is drawn on this screen and never written, so there is no canonical number here for anyone to trade against.

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And a reading cannot be quietly withdrawn. A disputant already tried to extend this one and was refused, so it paid to pin its own copy instead.

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Now the outlier's lifetime runs out. Thirty of thirty-one. Nothing was deleted, the chain simply stopped serving it, and the copy someone else paid for is still here.