When you are having a dream at night, and someone hands you a check for $100,000, where did the check come from? Is there a bank of dreams where they issue checks?
The person that handed you the check, where did they come from? Is there a dream financial district where this guy lives his life and goes to work every day?
And how about the sidewalk you are standing on in the dream. Is there a dream construction/contracting company that comes out and pours cement and makes the sidewalk?
Or are all those things a) really just YOU and b) look real and whole (the person, the check, the sidewalk) because by APPEARING whole and complete, they serve the purpose of the dream?