A man with a gray beard and a little boy are sitting on the floor looking over some papers in a room with a bunk bed.
The man and the boy are taking a nap on the bunk beds.
they will either be sitting on the floor or napping on the bunk bed
The man and boy cannot be sitting on the floor and taking a nap at the same time.
The two people cannot be looking at papers and taking a nap at the same time