I often hear that fingerprints are unique, and you will share yours with no one. How much truth is there to this? I'll accept that there is very little chance you will find someone with identical finger prints, but I'm not entirely convinced that no two people will ever have identical ones. On what do forensic scientists base their claim? Since criminal convictions can be made on only one fingerprint, or a fraction of a fingerprint in some cases, I also wonder what the chances are of sharing one fingerprint, of a fraction of one with another person.