The general doctrine about knowledge which I sketched at the beginning of this section, which is the real bugbear underlying doctrines of the kind we have been discussing, is radically and in principle misconceived. [It] would be a mistake in principle to suppose that the same thing could be done for knowledge in general. And this is because there could be no general answer to the questions what is evidence for what, what is certain, what is doubtful, what needs or does not need evidence, can or can't be verified. If the Theory of Knowledge consists in finding grounds for such an answer, there is no such thing.