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 machines that passed the test could not sense or grasp hidden human emotions, such as irony, puns, sarcasm and lies
 If, after some questioning, C can not tell the difference between A and B, the machine a passes the Turing test