text: Propponents may say people can easily put on false emotions, such as a "false smile" but in paragraph 8 it states, "..muscles called obricularis oculi pars palpabraeus make crow's feet around your eyes. But in a false smile, the mouth is stretched sideways using the zygomatic major and a different muscle, the risorius. To an expert, faces don't lie; these muscel clues are sometimes used to spot a "smiling" politician or celebrity [that] isn't being truthful."