…that yes that sort of thing they're weakly coupled yes and then you can have the way that you could then extend this. Arnold Mendel is the person who's pioneered this model in non family groups. Are you familiar with his work? I am. Do you know Arnold…

…Mendel is the person who's pioneered this model in non family groups. Are you familiar with his work? I am. Do you know Arnold Mendel? In his book, the year one he talks about the modelling of social groups, how you have a social group and that each…