It also provides an opportunity, and I think this is quite important, for people to get to know what is happening within the fields of expertise, which increasingly in our society become more and more specialised, more and more hedged off from one another, and in a sense I think that there is a very great danger if intelligent adults in the community, laymen in effect, don't have some idea, some coherent idea, of what's going on in these fields of specialisation and expertise.