<|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 believed to be composed of an etherealsubstance, making them lighter than solid material. Therefore, they may be able to walk through walls, but not through solid flooring, since the flooring would provide too much resistance. Also, they may be able to slide down stairs because they lack any solid mass. In either case, the ghosts would remain just out of reach of the person on the floor, giving an other-worldly feeling without actually appearing or making a physical presence.