Per 
Eve's Guest Lecture at Alexylva University
Topic: Is it possible for the character in your novel, genuinely realize the fact that he's in an internal world?
Let's give the character you've created a name, how about, Neo.
Section 1 Does Neo have free will
-Example 1 (with PPT slide): A play with one stage; stage - audience
-Example 2 (with PPT slide): A play with two stages; small stage - larger stage - audience
In Neo's pov, to "genuinely realize the fact that he's in an internal world", or say, to "genuinely realize the fact that he's in on a stage and there exists audience", the situation has to be E1.
That is saying, Neo *must* have free will.
Section 2 In what way Neo can have free will
-Neo is in an internal world.
-Physicalism: Every physical element is created by the external world. Mental properties supervene on physical properties. The mental properties of an internal world character are created by the external world. Neo cannot have wills that are independent of the external world.
Section 3 The expression of Neo's free will in the external world
-Does Neo have to have absolute free will to genuinely realize the fact that he's in an internal world?
Possible solutions:
1-Open ending
2-Observer's pov
3-Neo alters the expressions of himself in the external world on his own will
