You have to be careful when you interpret a religious passage. For starters you don't (do you?) speak the original language, so you're at the mercy of the tran

You have to be careful when you interpret a religious passage. For starters you don't (do you?) speak the original language, so you're at the mercy of the translator for the term "mark" But, going more meta, most religious traditions don't have a strict textual interpretation of their texts. Certainly the author could not have known fingerprinting techniques 2000 years ago. It is not unreasonable to interpret "mark" to be an identifier. Of course then the "fingerprint" mark would have to be compatible with the rest of Revelations.