  Since philosophers deploy apparently different standards, it is not clear what it means to say that philosophy as a whole has a poor historical track record. Consider the early Popper (1935), who held that no amount of evidence can make an unfalsified theory probable (or at least no more probable than any other unfalsified theory). This is the kind of example David Lewis wields to poke fun at philosophy: surely—surely—the standards that led to this conclusion are not trustworthy. The theory of relativity is undoubtedly more probable than the as yet unfalsified hypothesis that the world will end in the year 2525. Yet if I do not share Popper's 1935 standards, the fact that his then philosophy of science is from my point of view manifestly wrong does nothing to shake my faith in my own philosophical standards. Similarly, take Thomas Aquinas, whose philosophical standards included consonance with the Bible and more generally with the tenets of the Christian faith. If I am not a Christian, the fact that Aquinas' philosophical theology is from my point of view wrong does nothing to shake my faith in my philosophical standards. Thus, that Sir Karl or St Thomas' standards were, as I see it, no good does not tend to undermine my faith in my own.