Oh no not another free will thread.

[henryp]

Here's my time travel hypothetical.

Bob video tapes Larry choosing between a banana and an orange.  Larry chooses an orange of his own free will.  Bob sends the video tape back in time to himself.  Bob now knows Larry will choose an orange.

Does Bob's knowledge of Larry choosing an orange make him choose the orange?  Or does Larry choosing an orange of his own free will cause Bob to know Larry will choose the orange?

No, see my previous response. Full knowledge of a future choice C does not necessarily determine the choice, but such knowledge does indicate it isn't a choice made freely in the libertarian sense.

Freely in libertarian just says that it's a choice, not causal determinism.  

Prior to receiving the tape from the future, Bob can't know what Larry is going to choose, which rules out causal determinism, no?