Communication is broken down as follows:
7 percent verbal (words)
38 percent vocal (volume, pitch, rhythm, etc.)
55 percent body movements (mostly facial expressions)
Listening and observing is much more than just words. Are you able to pick up on non-verbal cues? You shouldn't over-analyze people's behaviors, but when you smell fish, it usually stinks. To me the moral of the story isn't trying to sniff out a fake, but just to pay more attention to more than what someones says. The way we carry ourselves and how our body language comes off speaks louder than words!