

Both Facewatch and Sainsbury’s point to the software’s “99.98% accuracy” – but Rajah suspects the margin of error is higher and has questions about the dataset behind this claim, and if it is representative of a range of body types and skin colours.
99.98% looks good to a layman, but that number is meaningless in reality.
Is that 0.02% error false positives or false negatives, or both?
Also, 0.02% means 2 in every 10,000. I don’t think it takes long for 10,000 people to go through the doors of Sainsburys every day, considering the UK population is about 65 million and they’re a nationwide company. Once this is rolled out nationwide they’re going to have constant false flags.
Scumbag oppressive tactics by a scumbag company.



That’s assuming it’s actually people and not bots driving “engagement”.
Is there really enough people signed up to a Telegraph account to provide 172 comments on a minor story within a day of publishing?
I don’t know, maybe, but I’m dubious.