Earlier quoted context omitted.
> If you build a system you can query for any face and get the identity True, but you can't. Facebook can't. That's (one of the reasons) they suggest tagging amongst your friends, not amongst all of FB people. You can identify one person (with a certain degree of certainty) against a certain range of candidates. Or you can search for one person on a small sample of images (100s or 1000s of images). So yes you can hav…
True, but that's not different from fingerprints. Fingerprints have collisions. That doesn't mean that it isn't a highly effective tool.
But they be better than face recognition at "search at a DB" tasks (especially if you have multiple fingers)