The Great Pretender: by Susannah Cahalan 6 years ago For centuries, doctors have struggled to define mental illness-how do you diagnose it, how do you treat it, how do you even know what it is? In search of an answer …more Share this:Share on Tumblr Click to email a link to a friend (Opens in new window) Email More Click to print (Opens in new window) Print Click to share on WhatsApp (Opens in new window) WhatsApp