I thought this would be a great list to share, but found it quite short and wanting in certain respects. I don't know what class of programmers this list is in

I thought this would be a great list to share, but found it quite short and wanting in certain respects. I don't know what class of programmers this list is intended for, but I believe that anything about biometrics should start with the statement that biometrics capture and verification are all about probabilities and thresholds for false positives/false negatives. They're not deterministic. This list doesn't comprehensively cover the falsehood that biometrics are considered by many systems to be static throughout one's life. Biometrics change with working conditions, age, health conditions, weather and environmental factors, due to accidents, surgeries, etc. The "Biometrics can’t be changed" section could do with more information.