I get what you are saying but rarely are things ever clear and simple. There is always an out. Something open to interpretation. In this case, the word unreason

I get what you are saying but rarely are things ever clear and simple. There is always an out. Something open to interpretation. In this case, the word unreasonable is it for me. It is subjective. The court decided in this particular arrest/search that it was reasonable for the one resident to consent to the search while the other resident was not there. It is still unclear to me who actually has the right to consent. I would guess the person has to actually live there at least (and not just some party guest or something). It could go further and be limited to only those that are recognized residents (like only those on a lease/deed). I would assume that if my minor child was home alone, their consent would not be valid. I guess there is still plenty of wording to shave off in future cases.