It can take a long time to say what the problem is. I just spent several hours trying to do this in Dan's case, and I'm not sure I succeeded. The questions aren't ill-posed, but the whole starting point was problematic. In effect I wanted to demonstrate the possibility of an alternative starting point. Dan managed to respond, and now I to that, and even this comment of yours contributed, but it took a lot of time and consideration of context even to produce an imperfect further reply. It's a tradeoff between responding adequately and responding promptly. There's been an improvement in communication since last time, but it can still get better.