I have defined free will as "an entity's conscious ability to make decisions independently of constraints beyond the control of that entity".-MATT: No - I didn't mean to forget you, but I would say your definition certainly encompasses the criteria I set forth. It gives us an upper and lower bound.-Thank you. The main stumbling block between Romansh and myself seems to be the inclusion of consciousness in the definition. I find the whole concept of free will inconceivable without it, but it would be interesting to know if others agree.