@saila If you're focused on facial-recognition, you're missing the point. The DNA/mismatching is an allegory for the lengths humanity will go through in order to 'fit in' with whatever social mobility model happens to work. Just as parents fight to put their kids in 'the right preschool,' or Ivy Leaguers fight to get hired by the right companies, there's a structure to our civilization and people are willing to game that structure in order to succeed. Still an enjoyable, thoughtful piece of scifi.