If you look into studies of lie detection training and efficiency, you will learn that it is mostly confirmation bias on the side of the lie detectors: humans c

If you look into studies of lie detection training and efficiency, you will learn that it is mostly confirmation bias on the side of the lie detectors: humans cannot really be trained to be powerful lie detectors. There is some new research on using MRI's to detect the brain pattern of lies, but it is still nascent.