yeah I think that you're right to say that we have to make a categorization of our beliefs in this or so so to speak different degrees of centrality but in fact there's some of my beliefs I think it is misleading to describe as beliefs and I think they are presuppositions that enable me to cope with a world do I believe that there is a real world out there independently of my representation see I'm gonna get on an airplane now when I call up the airline when I get on the computer to find out is the plane on time I don't then have to