I'm convinced that the producers dropped a very heavy hint about using process of elimination on previous match ups. Clearly these people weren't going to figure it out by themselves.
My money's on Tyler and Brandon being a match as well. Not only do we know that Brandon's match has to be either Briana or Tyler but using process of elimination on the second match up ceremony, we know that either Alex and Anthony or Tyler and Brandon are a perfect match. While it's possible that Alex and Anthony are a perfect match, we haven't seen that pair interact much at all.
Personally, I would love if the logic puzzle took a larger role in the show. I guess one can dream for at least a season full of hot mathematicians, scientists and engineers...