According to [Wikipedia](https://en.wikipedia.org/wiki/Turing_test)

> The "standard interpretation" of the Turing test, in which player C, the interrogator, is given the task of trying to determine which player – A or B – is a computer and which is a human. The interrogator is limited to using the responses to written questions to make the determination.

[![Turing test diagram][1]][1]


 [1]: https://i.sstatic.net/BqThf.png