An interesting example of how the mind works:
I have a cool mist humidifier on the bed table.
I fell asleep with it running. I heard the button being clicked and I heard the mister shut off.
I turned my head that direction, and said, “Hey you are turning off my mister...”, But there wasn’t anyone standing there... I could hear my wife out in the living room as she was sorting through some papers, so I got up, and went to her to ask, “Hey, did you shut off the mister, or was I having a visitor?”
She laughed and said, “Yes, I turned it off 20 minutes ago. You were snoring when I did it.”