'The compatibilists' main adversaries are incompatibilists, who deny the compatibility of free will and determinism. Some incompatibilists remain agnostic as to whether persons have free will. But most take a further stand regarding the reality or unreality of free will. Some of these incompatibilists, libertarians, hold that at least some persons have free will and that, therefore, determinism is false. Other incompatibilists, hard determinists, have a less optimistic view, holding that determinism is true and that no persons have free will. In recent times, hard determinism has fallen out of fashion, largely because our best sciences suggest that determinism is false. But the spirit of the hard determinist position is sustained by hard incompatibilists, who hold that there is no free will if determinism is true, but also, that there is no free will if determinism is false.'