So, based on information gleaned entirely from The Hunger Games
theoretically it's possible to 're-wire' someone's brain under torture so that previous memories/knowledge is replaced with something else.
When the DC were little, after a while baby wipes smelt strongly of baby poo and even when we got past the nappy stage wipes smelt of poo. Friends report the same experience, with the strong poo smell gradually going away as their children grew further away from babyhood.
I was pondering this today and wondering whether the baby poo effect is the same as the results gained from memory-suppressing torture, due to the severe sleep deprivation, unpleasant smell, stress, repetition of mundane tasks and raging hormones associated with changing a baby's nappy. Are our brains being rewired under accidental torture?