Does it matter? Work it out.You still haven't said what a ghost is. If we don't know what it is, we cannot say if it's reliably appearing. How do you tell the difference between a ghost, a fairy and a UFO?
PerhapsSure, people use things without understanding them all the time. But we aren't talking about using ghosts.
I'm pretty sure that's only true in fantasy RPGs.
 
				 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		