<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why don’t ghosts fall through the floor if they can walk through walls and glide downstairs?
<|assistant|>
Ghosts are thought to be able to pass through solid material because of their ethereal nature. Since a ghost has no physical substance, it is able to pass through walls and floorboards, much like a shadow. Additionally, some supernatural theories suggest that ghosts use the ether, or some kind of astral plane, instead of solid matter to move from one location to another.