What about when people say it does exist - is that a falsifiable position? If nobody can conclusively say anything about "free will" - if all we can agree on i

What about when people say it does exist - is that a falsifiable position? If nobody can conclusively say anything about "free will" - if all we can agree on is that it's intrinsically ineffable - then it all starts to sound a bit like Russell's Teapot, or angels dancing on pinheads, and we should probably focus our energies on something more effable.