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  • Carl Gohrigner on Face the future
    03 Dec 2019 09:43
    Big Brother Watch like saying that the system is 81% inaccurate, even though they know full well it is not true. Consider this. There are 1,000 people in front of you: - You deploy an automated system to ASSIST. - The system instantly assess all 1,000 people and selects 10 for you to assess. - 5 of the selected 10 people are from the 6 criminals. The other 5 are not criminals. - YOU (NOT the system) assess these 10 people to make a determination. - There are 994/1,000 non-criminals. You deem 995 are non-criminals. 1 slipped through the net. - The system’s false reject rate was 1 / 1,000 (the missed criminal) = 0.1% * - The system’s false accept rate was 5 / 1,000 (the non-criminals it select for you to assess) = 0.5% * - The accuracy of the system was NOT 50% (5/10) - You only needed to assess 10 people, not 1,000. - You caught 5 of 6 criminals, which you otherwise would not have. If the system was 81% inaccurate, as reported, it would have selected over 800 people, not 10, from the 1,000 for you to manually assess. Also, the police are not tracking you, unless "you" are a criminal. Only the people in their database are tracked. I fully agree. A debate is necessary. A collective decision on the appropriate use of this technology is required. It should not be blanket deployed. Some uses are intrusive. But let's base the debate on fact and not misinformation please.

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