Robin wondered how he had missed anything important in his plan for revenge and waited to hear what Sabrina had to say.
"What if the guest refuses to provide identification because he or she doesn't have any?" Sabrina asked, sensing Robin's confusion. She added, "Or let me put it this way, what if he or she never brought it along? After all, you never mentioned it as a requirement during the wedding announcement."
Robin smiled, but there was a tinge of mischief in it. He intentionally left out the part about the identification for reasons best known to him.
"It's all part of the trick. If I had mentioned it, the person would find a way around it. So, if someone doesn't have it, then his or her fingerprint would have to be taken for verification," he explained, hinting that the guest would not have the opportunity to leave without a fingerprint verification.