Uncanny valley

hypothesis that human replicas which appear almost like real human beings elicit revulsion

The Uncanny Valley is a theory that Masahiro Mori had about robots and the uncanny. The theory is that when robots start looking more human, people start to like them better until they look almost completely human and become scary but that they can eventually get to the point where people can’t tell they aren’t human and then people go back to liking them better.