 Note that the above style of approach can be given both a rationalist and an empiricist gloss. If unification, or epistemological conservatism, are themselves a priori rational principles, then simplicity principles stand to inherit this feature if this approach can be carried out successfully. However, philosophers with empiricist sympathies may also pursue analysis of this sort, and then justify the base principles either inductively from past success or naturalistically from the fact that such principles are in fact used in science.