Here’s an argument against naturalistic determinism based on the relationship between free will and rationality.
Free will makes rationality possible. If there is no free will, then no one is capable of choosing to believe something because of good reasons. One could never adjudicate between a good idea and a bad one. He’d only believe what he does because he’s been predetermined to do so. Arguments wouldn’t matter.
That’s why it’s odd to hear someone try to argue for determinism. If he’s right, then his conviction is not really based on reasons--on the merits of the view itself--but on prior conditions that cause his belief. He’s determined to believe in determinism.
Without freedom, there is no rationality. Every one of our thoughts , dispositions. So, oddly enough, if there is no free will, no one could ever know it, because they could never have a good reason to believe it.