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Do you really believe that if they scan your photo library at 10am and don't get any false positives, another scan five hours later, with no changes to the library, has the same chance of getting false positives as the first one, independent of that result?

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Even if the library doesn’t change, doesn’t the possibility of the list of “bad” hashes changing exist? I.e., in your example, a new hash is added to by Apple to the list at 11:30am, and then checked against your unchanged library.

Oh god have mercy on whatever has happened to these people…

If you take photos, then yes?

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