Hmm, it looks like some Homins view these doorways as lift or elevators, but they look and act more like short distance teleporters to me. In that case they could be designed to only do 1:many or many:1 actions (one entrance to many apts, many apts to one exit). This probably doesn't help the discussion, but it just felt weird since i've never viewed them as moving elevators/lifts.
