I think it’s correct that “99% accurate” here means “99% true positive and 1% false positive”. Agreed that “accurate” is ironically an awfully imprecise word to

I think it’s correct that “99% accurate” here means “99% true positive and 1% false positive”. Agreed that “accurate” is ironically an awfully imprecise word to use. As for why it is the case, I presume it is just the usual focus on counting your hits and not on your misses.