Robots are everywhere and do most manual tasks for humans. They can't speak, but you apologize when you bump into them, say thank you, and treat them well. One morning, you wake up and look outside to see chaos and destruction everywhere, and only your house and front yard are in pristine shape.
Your roommate is a hulking demon, a former warlord with millennia of combat experience, and the picture of menace and brutality. You just caught them halfway through a gallon-sized bucket of your favorite ice cream, frozen like a deer in headlights.
Did you know, human mouths have a higher risk of infection and disease than any other animal besides certain lizards?" You calmly explain. The alien looks in horror at the bite wound on its arm, then back to you in horror.
You wake up in a chair in a padded cell. Someone else sits across from you. A voice from a speaker in the ceiling says, "One of you is a natural person. One of you is artificial. Determine which is which. The real person gets to go free." You can't remember anything before this room.