This is a good description I agree. I think we make mental notes of differences between people. I grew up in an almost ridiculously diverse area so I marked my

This is a good description I agree. I think we make mental notes of differences between people. I grew up in an almost ridiculously diverse area so I marked my memory of people by a mix of characteristics: nose like so, cheekbones like so, hair like so, etc. I didn't realize until I was much old that many of those characteristics might be typical for people from that part of the world. Groups of people from the same area cause this strategy to fail so you have to learn new "recognition identifiers".