[justsomehnguy]

Which means John Doe, DOB 11/12/1975, 6'12'' (OH, 123456) and John Doe, DOB 11/12/1975, 6'12'' (FL, 123456) are two different people!

[yencabulator]

Each identifier identifies a person. A person may have multiple identifiers. I have a non-US nationally-unique drivers license ID and a passport number.