Both learning and experience. What you work on is getting the little things to become habits, so that you don't have to be "locked into" them. This is how you learn to read. You start with phonics, but you don't use phonics when you are an adult, except when you discover a new word. SO with reffing, you start by consciously having to think about all the details, but as they become more automatic, you begin to learn to parse the sentences and paragraphs, so to speak. You can learn all this more quickly by not only reffing, but also talking about reffing, and watching good refs from the stands.

I think I agree with this. But I had trouble with some of the big words; so I'm not entirely sure. :D

I agree with this. If it's an obvious situation, just turn around and say, "Coach, that's 5". If it's heated, then have a partner do it.