It's a simple logic problem, easily solved using the tautological analysis of simple logic.

I read a few posts. Fact is, I really don't care who's shaggin who. If anyone does, read up on basic philosophy. A hoops B and truth tables and such. Hey... I got an A+ for 9 (NINE!!!!) credit hours at uni for memorizing the 16 basic tautologies of logic which have served me well in many legal disputes on construction contracts and in day to day life. And I are a inguneer so I had to werk reel hard at it.

Fact is, IMO, the only people who come to the correct answer of the OP are two... one who inherently sees the logic and one who is taught logic. Those not taught logic have a 50/50 chance of getting it right. To equate that in any way to intelligence is 0/100 plus or minus the stunned as me arse coefficient of WTF? which varies over time and time of day. Unless further refinement addresses thinking eveyone else is stupid... that situation is 100/0 with ZERO deviation, standard or otherwise, and it don't take any logic to figure who the zeroes are.

As for the answer re the OP... I need another beer. I'll be right back.