You did indeed catch the general point and you stated it well. The only disagreement is about last comment on the purity and 'spiraling'. However, I'll address that in a separate thread that should, hopefully, logically dispell the myths and rumours which befuddle people trying to get a foothold on the questions. Until very recently I didn't realize how far afield the lack of facts had slowed progress.
I understand where you're coming from now. Thanks for taking the time to explain it.