Here's a really interesting argument for libertarian free will. I found it in Greg Boyd's Satan and the Problem of Evil : If humans lack a logically consistent concept of self determining freedom, What provides the analogical ground by which we can talk about God is gracious self determining freedom? A concept devoid of all experiential content is vacuous. If we assume that it is meaningful to claim that nothing outside gods will caused him to create and interact with the world, That he could have done otherwise, And that his decisions are not capricious, Then we must affirm that we experience something like this sort of freedom. In short, Unless we were free in a self determining sense, We could never meaningfully says that God is (page 70). So what is the argument? Something like the following: A concept is knowable/intelligible only if there is some experience that gives us the content of the concept. If there was no experience of having something like self-determi...