Some philosophical research projects - or problematics, to speak with the more literary types - are rather like working out the truths of chess. A set of mutually agreed-upon rules are presupposed - and seldom discussed - and the implications of those rules are worked out, articulated, debated, refined. So far, so good. Chess is a deep and important human artifact, about which much of value has been written. But some philosophical research projects are more like working out the truths of chmess. Chmess is just like chess except that the king can move two squares in any direction, not one. I just invented it. … There are just as many a priori truths of chmess as there are of chess {an infinity}, and they are just as hard to discover. And that means that if people actually did get involved in investigating the truths of chmess, they would make mistakes, which would need to be corrected, and this opens up a whole new field of a priori investigation, the higher-order truths of chmess … Now none of this is child's play. In fact, one might be able to demonstrate considerable brilliance in the group activity of working out the higher-order truths of chmess. Here is where psychologist Donald Hebb's dictum comes in handy: If it isn't worth doing, it isn't worth doing well.
( Daniel C. Dennett )
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