In con­junc­tion with the new Nation­al Geo­graph­ic pro­gram “Break­through: Decod­ing the Brain,” com­ing this Sun­day, Novem­ber 15, at 9 pm ET, I was asked to pro­vide my per­spec­tive on a very provoca­tive question: What if sci­en­tists were able to implant or erase mem­o­ries? For some, like those suf­fer­ing from PTSD this could be life-chang­ing, or do you…