In a room, Anaya can see invisible objects and beings. Keiji can pass through walls. The room has an opaque, indestructible cube in the center, and there's a ghost hiding behind the cube. Both Anaya and Keiji are standing at one corner of the room. What does each person know about the ghost's location?

Make your response very short.
Anaya knows the ghost's location because she can see invisible objects and beings, so the opaque cube does not obstruct her vision of the ghost. Keiji does not know the ghost's location because he cannot see the ghost and the cube blocks his line of sight. However, if Keiji walks through the cube, he would then encounter the ghost since he can pass through solid objects, thereby revealing the ghost's location to himself.