I worked with a pathological liar for about a year. We didn't have day to day interactions, but he was always eager for an audience and if I had time I'd humor

I worked with a pathological liar for about a year. We didn't have day to day interactions, but he was always eager for an audience and if I had time I'd humor him. My goal was to let him spin his yarn and wait for him to contradict himself in some way. Rather than directly going a "gotcha" I'd act sincerely confused, "Oh, you just said you met him yesterday, but earlier you said you met that person months ago. I must be misunderstanding." Then I'd just enjoy how effortlessly he would create a new fabrication to cover up the gap in his story. I guess practice makes perfect, or at least better. He was incredibly bold. Once he told me about spending Thanksgiving with a coworker ... and that coworker was in his cube immediately adjacent to mine. After the BS artist left I asked the guy in the next cube if her heard that ... nope, he was wearing his headphones. When I relayed the story, he said nope, he was more likely to shoot the BS artist than invite him over for a meal. He ended up getting fired because he was taking time off work to attend classes at Stanford. After a few months of this someone in HR checked with Stanford and they said they had no record of a student by that name. LA few weeks after getting fired, HR received a call from another company checking references on one of our former employees, Dr. <bs artist surname>.