Well, to some extent, he is right. In a Narco Analysis Test, the subject's inhibitions are lowered by interfering with his nervous system. Basically it reduces ur ability to think and frame up an answer. So, technically, it becomes difficult though not impossible for the subject to lie. So, if someone has a very strong nervous system or he has already framed up a predecided answer to a question, he can still lie while going through narco analysis
