When a person is inauthentic, they don’t want to be found out, so their defenses go up and they become uncomfortable. On situations like this, check out facial expressions, body language and speech patterns. Does the person avoid eye contact? Does he/she lean away from you when he/she is talking? Or cross his/her arms tightly over his/her chest? These are all examples of defensive, possibly phony behavior as explained by Cynthia Cohen a Los Angeles psychologist.
Further, a fake will just smile with the lips, while a truly happy person smiles with the whole face-the eyes, forehead, mouth and cheeks. In addition to that, look for micro-expressions, those quick, intense, telling expressions.
Oh, now I wish I was a psychologist. It would be easy for me to identify and eradicate the phony people in my life. Do you have the same wish?