response: Hmm yes.  The've also been described as wispy shapes or realistic and lifelike!
original_response: Descriptions of ghosts vary widely from invisible to translucent.  What did you see or feel?
history: hey do you think ghosts exists? Hmm I don't have that information here right now.  They've been described as being translucent or even invisible, as I understand. Yes.  But I think I've heard of other sorts of descriptions, too.
knowledge: Descriptions of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to realistic, lifelike visions.