There is a huge body of evidence to support the notion that me and the police were put on this earth to do extremely different things and never to mingle professionally with each other, except at official functions, when we all wear ties and drink heavily and whoop it up like the natural, good-humored wild boys that we know in our hearts that we are. . These occasions are rare, but they happen - despite the forked tongue of fate that has put us forever on different paths.
There are three basic problems: how a mind can know the world of nature, how it is possible for one mind to know another, and how it is possible to know the contents of our own minds without resort to observation or evidence. It is a mistake, I shall urge, to suppose that these questions can be collapsed into two, or taken into isolation.