User blog comment:B1mb0w/Mapping D(l,0,1) to epsilon nought/@comment-1605058-20150702203134/@comment-10262436-20150702210847

I agree that this is the "pivot" that either gives the D function its strength, or, is the source of an error I have made.

In the main Strong D Function blog, I have started clearing away the clutter and I want to focus more on the General Rule G1. I think it is correct and it is correctly applied. But perhaps you can scrutinise more carefully when I make my case.