In my view, intelligibility is the basis on which we should judge a philosophical theory. Then we can rank theories by which are more intelligible or render mor

In my view, intelligibility is the basis on which we should judge a philosophical theory. Then we can rank theories by which are more intelligible or render more phenomena more intelligible. A theory that makes some phenomena transparent, i.e. conceptually reducible to other phenomena, is more intelligible than a competing theory. Progress in philosophy is the process by which opaque phenomena are rendered transparent. Dogma hinders this kind of progress.