body language warning
Body language is not an exact science.
No single body language sign is a reliable indicator.
Understanding body language involves the interpretation of several consistent signals to support or indicate a particular conclusion.
I am glad the author included this....sometimes people read these articles or books or watch the show Lie to Me and assume they can decipher every nuance....and that because most people do "this" with their hands when they are nervous means everyone does "this" with their hands when they are nervous.
It was very informative, however.