Marilyn Mason, a humanist and Gavin McGrath, a Christian, join Justin as they discuss where they get their sense of "right and wrong" from.  Gavin says that without God we can't make sense of morality - Marilyn disagrees.

To hear more discussions between Christians and non-Christians go to www.premier.org.uk/unbelievable. Join the discussion on the Premier Community www.premiercommunity.org.uk/group/unbelievable.