@litewave,
												Forget about  the layman's terms  "belief"  and "reality"! The "naive realism" to which those words refer   involves the idea that there are "things in themselves".  Contrary to that simplistic idea,  Thomas Khun's celebrated "The Structure of Scientific Revolutions", reinforces the view that things/concepts are better understood  as  interconnected 
nodes of  communicative significance within epistemological networks rather than separate ontological entities in their own right. For example "an electron" has "existence" by virtue of its relational connections with 
 all  aspects of chemical, atomic, and electromagentic theory. Thus entities  
exist by virtue of their 
utility, within sub-domains of social interaction called "paradigms".
So once again, ( hopefully for the last time), within the paradigm of social dynamics the term "free will" has 
existence by virtue of its interconnections  with other terms like "responsibility" , "liberty", "morality" etc. By  challenging   the 
utility of one component  you challenge  the whole paradigm.