You can not know the false negative rate without investigating 100% of all photos. You are asking for the impossible.

fc417fc802 an hour ago | parent | next [-]

Sure you can, random sampling should work. Don't just go making things up.

Of course actually carrying out that experiment would be absurd since I don't think anyone expects an appreciable percentage of clearnet material to be CSAM. The working assumption is that the goal is to find a needle in a haystack so GP's objection about needing to know the false negative rate is misguided.

	▲	bluGill an hour ago \| parent [-]
		I expect the equivelent of the fbi is investigating this using other sourcs and so has plenty of data without needing to randomly sample any non-suspect conversation. CASM has been a problem since before computers.

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bluGill 3 hours ago | parent | prev [-]

if you want perfection. But the eu should be doing investigation that they can use statistics to create a good estimate.