The Turing test is a famous experiment proposed by Turing in 1950 to test whether a machine can exhibit the same or indistinguishable intelligence as a human  A person (codename C) uses a language that the test subject can understand to ask any set of questions to two objects he can not see, namely a machine (codename a) and a normal-thinking person (codename B) 
The elements of human intelligence can be broken down into insight, logical reasoning, and so on, whereas machines that pass tests only have the ability to make judgments based on sound logic and strategy
 If, after some questioning, C can not tell the difference between A and B, the machine a passes the Turing test