It takes less than a second to tell humans from androids...

...It can be hard to tell the difference between humans and androids in such sci-fi TV shows as Westworld. But in real life, beyond our screens, the human brain takes less than a second to tell between reality and fantasy, according to new UC Berkeley research.
The findings, published in the November issue of the journal Nature Communications, show that humans are visually wired to speedily take in information and make a snap judgment about what’s real...

http://news.berkeley.edu/2016/11/28/ensembleperception/