The first picture I showed you was a kind of psychological exercise, I'm sure you've heard of it, a Rorschach test. Nearly a hundred years ago, Swiss psychiatrist Hermann Rorschach came up with this method to get insights into his patients' personalities. He showed his patients random symmetrical ink patterns and asked them to describe what they saw. Rorschach thought that like if a patient described screaming faces all the time that could be a sign of anti-social tendencies or anxiety. Sounds pretty subjective, and it was which is why it's not used in psychology much any more.