Two exact , doppelgänger, cast metal heads rest on black metal fence, this is as close as I could find human doubles only these are inanimate objects without bodies.
According to various dictionaries both book or the Internet, someone who looks exactly the same as a living person is a doppelgänger derived from German meaning a spiritual alter ego.
Some German folklore suggests we all have a spirit double who is an invisible, identical twin to us that may be spiritually opposite moreover if we ever run in to them it’s a bad omen signifying our
death.
Doppelganger experiences can also be symptoms of irregularities in the human brain caused by accident or abnormality affecting certain parts of the brain a good example of this phenomenon is the “out-of-body”or OBE.
These are simply hallucinations correlated with the temporoparietal junction or TPJ, where touch, vision, proprioception, and vestibular signals integrate according to a BBC Neuroscience article found here.
This is my contribution for WP single word prompt:”DOPPELGANGER”.
Mainline_Matter 
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