Consider this scenario: You're walking down the street and a small woman walks past you and stumbles. You help her up and she says thanks, then gets back on he

Consider this scenario: You're walking down the street and a small woman walks past you and stumbles. You help her up and she says thanks, then gets back on her way. How can you "scientifically" prove whether she was a human or not? Of course you could put her on an operating table and cut her open... but she moves and breathes and feels everything as a human. How could you force that treatment upon her? And then you'd have to do it for everybody else. How do you know the surgeon isn't a humanoid robot? How do you know you're not a robot yourself?