Okay, so what you're saying is that the basic physical movements need to be developed before you can start to be effective with regards to problem solving in a BJJ context. I don't disagree. Presumably you think that that physical knowledge can be gained through rolling. Again, I don't disagree. I'm just saying, in general (though I probably fucked up by using Gracie U as an example given their myriad of problems), that I think there can be a more effective way to convey that physical knowledge, rather than having a relatively new white belt student thrown into rolling after the pretty standard 'move of the day' way of teaching that most BJJ schools do. I think it's possible that some physical knowledge (not all) can be gained better through positional sparring (i.e. one guy tries to pass the other's guard, the other tries to sweep him) after conveying technique in a lesson, at least for new people. What do you think?