Many philosophers believe that when we make free choices, we are determined to make those choices. (Some people who hold this view, for example, believe that given the beliefs and desires which we have on any given occasion, we will act in a certain way and we are simply unable to do anything else.) Let’s call these philosophers compatibilists, since they believe that freedom is compatible with being determined to act in a particular way.
The other kind of theory of freedom should be called incompatibilists, since the people who hold theories of this kind believe that freedom is incompatible with being determined to act in a particular way.
— Scott Davison, from Reason for the Hope Within, p. 220, 221