Incompatibilism - Pessimistic Incompatibilism

Pessimistic Incompatibilism

While hard determinism clearly opposes the concept of free will, some have suggested that free will might also be incompatible with non-determinism. This is pessimistic incompatibilism, and has been used as an argument against Libertarian incompatibilism.

Under the assumption of naturalism and indeterminism, where there only exists the natural world and that the natural world is indeterministic — events are not predetermined (e.g., for quantum mechanical reasons) and any event has a probability assigned to it — no event can be determined by a physical organism's perceived free will, and nor can any event be strictly determined by anything at all.

Hard incompatibilism differs from hard determinism in that it does not commit to the truth of determinism. Typically, supporters of hard incompatibilism accept both libertarian critiques of compatibilism and compatibilist critiques of libertarianism.