Little white lies are the ones we tell to shield ourselves and others from emotional fallout. And their benefits may extend beyond saving a little heartache. Shankar Vedantam, host of NPR’s “Hidden Brain,” joins host Krys Boyd to talk about the myriad ways we lie to ourselves on a daily basis and how that might actually help lead to a much happier life. His book is “Useful Delusions: The Power and Paradox of the Self-Deceiving Brain.”