Doppelgänger, (German: “double goer”)
In theory, it is believable that you are the only person who looks, acts, and sounds like you. Your face is the foundation of what is your identity to be identified. Most animals rely on their sense of smell to identify and differentiate each other; humans, however, primarily depend on sight to recognize different individuals. With 7.4 billion people on the planet, there is only a 135 chance that there is a single pair of doppelgängers. It’s a mathematical equitation that is an input and output repeated until the answer is the same as yours. It’s just a matter of someone else having the same version of you. There is only so much genetic diversity to go around. But the human face is extraordinarily unique because of the low chance of seeing someone who looks exactly like you.
However, we aren’t all the same internally as we can be physically. Beyond the face is what develops our conscious selves. Life experiences from infancy to adulthood molds our internal identity. The processing and interpretation of life experiences of the mind is completely different to other people. How the mind reacts is unpredictable. For, example a doppelgänger can be an alternate version of you that is evil and only hold a physical resemblance of you. Much like Elaina in the Vampire Diaries series, if you are familiar with that show. It’s a product of our perceptual experience. The extent to which we spend time with, the extent to which we have close friends of another race or ethnicities. We often believe that people from different races, especially not from our own, tend to look similar. In seeing yourself outside of your body can be leave a feeling of uncanny for some people.