I often take it to the ridiculous point and use a scenario with only one possible positive case. Like: There is only one person in the world who is you. Let's

I often take it to the ridiculous point and use a scenario with only one possible positive case. Like: There is only one person in the world who is you. Let's say I had a facial recognition system that had a false positive rate of only 1 in a million. If I tried to find you by having the system scan through pictures of literally everyone on earth, how many people would I incorrectly identify as you?