I’ve been reading Donald D. Hoffman’s The Case Against Reality: How  evolution hid the truth from our eyes. At one point Hoffman uses a  Wittgenstein quote to raise a point about how our senses can deceive us,  and this got me thinking about distortions in our moral perceptions,  too. Hoffman makes the point that from the basis of our everyday  perceptions of the world it is very natural to experience the earth as  the unmoving centre of the universe; to believe that the sun goes around  the earth. This quandary was once put to Wittgenstein, whom replied,  ‘what would it have looked liked if it had looked as if the earth turned  on its axis?’. This gap between perception and reality then made me  think that something like this can occur with our moral sense. How best  to treat addiction, for example, is just such a case in point.