What do we do while deciding if free will exists?

[bennyboy]

The fact is that I'm completely immersed in the fairy tale that we call human existence--

-and yet you and I can have this conversation...we can express this doubt, we can both accept that it is not all as we see it....so no...judging by this conversation alone neither of us is so immersed, and immersion would not be any excuse for advancing a non-factual position -as- fact by brute force.

I'm immersed enought that even though we are talking about free will, and the possibility that it's an illusion, I still feel like I'm acting completely freely while I think and type. I still feel like my wife is a solid body (well, kinda solid lol)-- not as perceived but in every sense that I know and experience her.

 and free will is no less valid in that fairy tale than anything else is. 

that which is valid is not always true.  

You forgot to call me Grasshopper.

The reality of physics and the reality of what it's like to be human are very different things, no?

Doesn't seem so to me....any disparity we're likely to reference is circumscribed, explained, and in fact a description -of- the physics of our perceptions, and I would say...no disparity -at all-.  You experience your wife as a physical object, for example -despite being empty space- because you are not structured in a manner that allows you to pass through her.  Similarly, you experience the soil beneath your feet as a "solid" block - impossible to traverse simply..a nematodes experience of the same is vastly different...and in this example not due to a difference in stuff or structure..merely a difference in scale. If you were structured differently, or of a different scale, your experience would be a description of those things, that relationship, instead.

That's right. If I was something else, my experience of the world would be totally different. To me, this means that the world view of people, or anything else, is essentially mythological.

You and I perceive that which we are equipped to perceive, in the manner that our perceptions are capable of perceiving them......there's a reason you can;t read my mind..there's a reason you don't see ir..there's a reason you don't hear infrasound, and there's a reason that you can't actually detect temperature as an absolute.... Don't you think?

Of course there is.
You seem to think I'm talking about idealism. I'm not-- at least not exactly. I'm talking about the fact that the world as we experience it is essentially mythological-- i.e. that our world view is mythological. That doesn't necessarily require that the universe itself, or the matter under the hood, is not physical monist. Different issue.