Do We Have This One?? Needs a Better Description. Needs More Examples. A trope appearing in certain science fiction works set in futures with lots of human-looking robots and androids. This is when characters have to test to determine if a given character is one or the other. Usually done by looking for clues in mannerisms and other tell-tale signs that someone is not quite human. Also can be done by asking questions only a human or a machine would be able to answer. A classic example is the Voight-Kampff test from Blade Runner, used to differentiate between humans and replicants.
Hello, Unknown Troper. You'll need to get known to lend a hand here.