 Oh, we miss your music, Harry, and we miss you, too. It's Mr. Chapin with me, Mr. Bailey. Just call me Lou. So, you want to know if someone is lying to you? Here's one way to find out. They have tongue trouble. Telling a lie requires your brain to bounce around to keep the story straight while concealing the falsehood, which makes speech difficult. Giveaways include stuttering, changing subjects mid-sentence, and the seeming inability to complete a thought.