The Cartesian and Compatibilist Fallacy
Descartes "I think, therefore I am" commits a mistake by assuming that if there is thinking, there must also be a thinker - something distinct from the thought itself that does the thinking. A more economical description is simply: there is thinking. A thought arises. In the same way, the statement "No one prevents me from thinking, therefore I have free will" is more accurately expressed as: thinking occurs unhindered.
Descartes claim and the compatibilist conclusion share the same fallacy. In both cases, the absence of one thing is treated as evidence for the presence of something entirely different. For Descartes, the absence of doubt is taken as proof that a thinking subject exists. For compatibilism, the absence of external constraint is taken as proof that free will exists. But the fact that we do not find an obstacle does not mean that we have found an author. Absence does not, by itself, create presence. It merely reveals a process unfolding according to its own lawful regularities. There is thinking. There is choosing. There is living. And within these impersonal verbs, no place remains for an independent agent.