I do not think that Keith thinks Dave is a liar. I think that Keith knows perfectly well that Dave did tell a lie to Scott in an attempt to play the game. Ok, he lied, but that does not make him a "liar." That incident of poor game playing does not define him as a person.As I discussed on another thread, Dave and Keith were both playing up to Scott last night just in case Scott (or Holly) got the power. They know they are safe with each other, they were not sure of their standing with Scott. Unfortunately, the goals of the two barbie couples last night conflicted when it came to appeasing Scott. That was sure to cause tension. And, in this battle for Scotts approval, Keith out played Dave. I think Dave realized it and that was part of his depression. He had played the game so well to that point and he slipped up, I think he realized that Keith was capitalizing on it and there was really no way out.
Between Keith and Dave I really do not think there is any hard feelings. They both are there playing the game and they both knew that at some point they would be at odds with each other. It hurts to have to play against a person you feel is your friend, but that is what it takes to win.
Keith will choose Dave and Charla. In spite of the turmoil of this end game, they are friends and have fought successfully to get to this point. Keith really has no reason to choose Scott what so ever.