This scene between Kat and Troy.

It seems obvious to me that Kat would not flip. I wander if the guys know this as well. If so, I speculate this may happen. The guys may user her to give false info to the girls. They could ask her to flip, she would agree knowing she will not really flip but could make the guys think she has flipped. Then the guys feed her false info such as who has the idol or who they are voting for. They could trick the girls into targeting the wrong guy. I know this is a stretch but it is the type of thing I would do if I was playing. I would really enjoy it if the guys were smart enough to pull something like this. They could even knock out Kim with this ploy. They could tell Kat Jay has the Idol and he plans to play it at TC. They also say they are targeting Christina or one of the girls. The girls could then target Troy. The guys could then target Kim. At TC Troy would play his II and Kim would either not play her II or give it to the girl she thinks is targeted. Then Kim would go home. There is a number of ways the guys could play this but this is what I would do. I am not sure if Troy truly trusts the core 4 alliance. If so he surely will go home soon. I just hope he is smart enough to see the truth and do some strategic game play to extend his game.