Jud Brewer is an American psychiatrist, neuroscientist and author. He studies the neural mechanisms of mindfulness using fMRI technology and has used his findings to treat addictions. Jud chats with the Armchair Expert about contentment vs. excitement, how meditation dissolves the sense of self and the biological reasons humans have cravings. Dax talks about how food scientists flavor foods to lose their taste and Jud gives Dax and Monica a test on openness. The two talk about the neurological reasons we behave the way we do and Monica reveals a big update in the fact check.