distribution is P of X given mine ok first scheme we might consider is max mode encoding so max mode encoding what do we do we say ok we have a mixture distribution in this method - code X well we don't know how to correctly from P of X but we know how to code from P of x given AI so what if we could get D on that was used to generate X then we can encode X there efficiently so we find an item maximize B of AI given X so imagine we're back to this mixture model thing our X falls here then we might sit home this mode over here is the one and this