According to Confucius, can non-virtue be learned ...
This is an interesting idea, but it seems like we first need to (a) know whether virtue can be learned, (b) know what Confucians would mean by non-virtue, and (c) know what they would mean by learning.
I think this hits upon an important point.
How clear do we have to be about the use of a term to ask a question that contains it? Is it enough to know the general definitions of 'learning', and have a vague idea of how it appears in the work asked about, to ask about what can be "learned"?