"Hidden Brain" podcast host and author Shankar Vedantam wants us to reconsider the impulse to make truth the be-all, end-all — and instead think about the value of falsehood. He joined The 21st to discuss this and more about his new book, Useful Delusions: The Power and Paradox of the Self-Deceiving Brain.

On the 21st: A rebroadcast of our interview with WBEZ Chicago's South Side reporter Natalie Moore - about her book "The South Side: A Portrait of Chicago and American Segregation." Plus, we discussed NPR's "Hidden Brain" podcast with host Shankar Vedantam.