Van Inwagen’s chapter on free will states that if determinism is true, only one future is genuinely open to us. He also says that free will is the ability to do otherwise, therefore, if we have free will determinism is false, hence, the two ideas cannot go together. Trying to solve this problem van Inwagen introduce three major positions. 1)Compatibilism: the idea “that free will and determinism are compatible”(p. 257). The mystery is that Compatibilists believe that freedom can be present or absent in situations for reasons that have nothing to do with metaphysics, therefore, it leads to the question when do we have free will. 2)Incompatibilism: the idea “that free will and determinism are incompatible”(p. 257) Incompatibilist must deny free
