You could either stop imagining or walk through the doorway(you said no doors, doorways can still exist without doors).Rah-Gashapon said:I have one:
You are trapped in a room, you have no idea how you got in. There are no doors or windows, no lights or anything, but a table. How do you get out?
EDIT: sorry for double posting.
p.s. If there is no light, how do we know there is a table there?