“At the opposite end of the spectrum, some people who have extensive damage to the prefrontal cortex can confidently recall things that never happened, a phenomenon called confabulation. Neurologist and author Jules Montague described the case of a young seamstress from Dublin, Ireland, named Maggie who was convinced she had visited Madonna’s house the week before and advised her on what outfits to wear on tour. Although Maggie had never met the pop singer, she was not psychotic nor was she lying; she had encephalitis, swelling of the brain, which was interfering with her ability to monitor the sources of information that popped into her head.”