Uncanny valley

[Lanell]

First theorized by Japanese [roboticist] [Masahiro] [Mori] in 1970, the Uncanny Valley basically states that the closer a robot or other nonhuman entity gets to resembling a human, the more humans will like and empathize with it.
However, there is a point in development where humans instead become strongly repulsed by the barely-human robot/entity. Fortunately, this effect fades as the robot/entity becomes less distinguishable from a human.
Although [hotly] debated, the theory is present in many sci-fi movies and the like, and has been used to explain peoples reactions to some computer generated characters.

[Greta]

used to refer to the unpleasant feeling that some people have when they see robots (= machines that can carry out actions automatically) , or pictures of a human being created by a computer, that appear very similar to a living human: