LZ Granderson: Is there a way to spot somebody who's not being truly authentic? He says people typically use the question inflection on their lie. This is something that liars do, and they don't believe their statement because they know they're lying. LZ: When you ask your price, you're telling someone, I'm not sure about this price. It's a little bit negotiable with me. And even subconsciously pick up on that; we are not accidentally using the question of flexion.