It is an interesting premise but the more I think about it, the less I am impressed in the password aspect. I feel as if this reduces to the N = 1 case of: Ask

It is an interesting premise but the more I think about it, the less I am impressed in the password aspect. I feel as if this reduces to the N = 1 case of: Ask N questions to all participants, match those that answer similarly for the most questions. Why would you only ask a single question to determine best matches? And why would that question be of your password? Taking into account more information can only be better for matching people, right?