You know how the people he's sees are just imaginary? Well how come he just can't just walk through them???? Or at least get someone else to??? Wouldn't that so prove they were fake??
"Life is like a mop."
~Stanley Spudoski
"I don't want to buy a ticket! I just want to buy the zoo!"
~Ford
in his mind this is all real and his mind tricks him into beliving all this
his interworld is meshed with the real world
remmember even after he accepts they are not real he still sees them
Your question is a very good one. If he was trying to figure out whether or not Charles, Parcher, and Marcy were real, it would seen obvious to do what you suggested. But, don't forget that with Charles he cares about him because he is is best friend. Would you want to discover that your best friend was only a figment of your imagination. The same thing goes with Marcy, the little girl. He loves her and it would hurt him badly to figure out that she was not a living being. With Parcher, remember that he has a gun. Would you try to walk through a guy with a gun? Don't forget, your not sure whether or not this guy is real. It's hard to say goodbye to people you love. It would be like finding out your an orphan child and that your mother was a dillusion. Wouldn't it be difficult to accept that your mother wasn't real? I hope I answered your question. Good day to you.