 With that in mind, let us now look at premise (9). This is a form of the Principle of Alternate Possibilities (PAP), a principle that has become well-known in the literature on free will ever since it was attacked by Harry Frankfurt (1969) in some interesting thought experiments. The point of Frankfurt’s paper was to drive a wedge between responsibility and alternate possibilities, and to thereby drive a wedge between responsibility and libertarian freedom. In general, those defending libertarian freedom also defend PAP, and those attacking PAP, like Frankfurt, defend determinism, but some philosophers have argued that PAP is false even if we have libertarian free will. The literature that clearly distinguishes the claim that free will requires alternate possibilities from the claim that free will requires the falsehood of determinism is contemporary. The former is a thesis about events in counterfactual circumstances, whereas the latter is a thesis about the locus of causal control in the actual circumstances. Aside from the foreknowledge literature, support for the rejection of PAP from the perspective of an incompatibilist about free will and determinism can be found in Stump (1990, 1996), Hunt (1999b), Zagzebski (1991, 2000), Pereboom (2000), and Shabo (2010). This view was originally called hyper-incompatibilism by John Martin Fischer, but has recently been called source incompatibilism. For a recent critique of this version of incompatibilism for solving the foreknowledge problem, see Werther (2005) and Talsma (2013).