Well, I do think it is reasonable to understand second order knowledge as just that: knowledge which is about knowledge. Think of it like this: I can know things that are propositional in form. So for instance I can know that: the cat is on the mat. I don't see what is wrong with saying: I know that: I know the cat is on the mat. Thus I believe Plato is right to be interested in this, it is not just a terminological confusion.
The Theaetetus, and epistemology, are definitely fundamental. On the other hand one great thing about Plato is that he shows the connections between epistemology, metaphysics, and ethics (and even political philosophy). I think he himself started more with ethical worries and that got him into worries about knowledge.
Make sure your bridge has an internet connection, I would hate to lose a listener.
Knowledge
Well, I do think it is reasonable to understand second order knowledge as just that: knowledge which is about knowledge. Think of it like this: I can know things that are propositional in form. So for instance I can know that: the cat is on the mat. I don't see what is wrong with saying: I know that: I know the cat is on the mat. Thus I believe Plato is right to be interested in this, it is not just a terminological confusion.
The Theaetetus, and epistemology, are definitely fundamental. On the other hand one great thing about Plato is that he shows the connections between epistemology, metaphysics, and ethics (and even political philosophy). I think he himself started more with ethical worries and that got him into worries about knowledge.
Make sure your bridge has an internet connection, I would hate to lose a listener.