If you know psychological manipulation then you can detect if people are doing it to you, http://www.amazon.com/Introducing-NLP-Psychological-Understanding-Infl

If you know psychological manipulation then you can detect if people are doing it to you, http://www.amazon.com/Introducing-NLP-Psychological-Understanding-Influencing/dp/1855383446 http://www.amazon.com/Introducing-NLP-Psychological-Understa... that should handle the smooth-talking part, but it seems like you'll still need some domain knowledge to figure out if someone is good at their job.