You appear to be missing the nuance of class knowledge vs individual knowledge. You might discover that 99.9% of Ashkenazi Jews have Eidetic Memory. When you c

You appear to be missing the nuance of class knowledge vs individual knowledge. You might discover that 99.9% of Ashkenazi Jews have Eidetic Memory. When you come across one on the street, that knowledge about the group tells you precisely zero things about that individual.