Subjective logic?

Read the last hundred or so sections of On Certainty, finishing up the book. I can't help but feel the book was off-target towards the end. Wittgenstein begins referring more frequently to subjective approaches to certainty - how other people can understand our certainty and what uncertainty means to communication. I don't consider the last sixth of the book to be nearly as well-written or powerful as, say, the middle half. Treating certainty within interpersonal communication as its own subject would require a separate book - weaving it into a discussion on personal certainty just doesn't seem appropriate.

That being said, Wittgenstein is a little hard to get through, but there's a lot to be said for his texts. I will have to reread him when I am better acquainted with logic, epistemology, metaphysics, and philosophy in general.