Full Idea
It may be that the two forms of grounding have a different source; the one from the bottom up is required for the constitution of the thing to be intelligible; the one from the top down is required for the essence of the thing to be intelligible.
Gist of Idea
Maybe bottom-up grounding shows constitution, and top-down grounding shows essence
Source
Kit Fine (Aristotle on Matter [1992], 2)
Book Reference
-: 'Mind' [-], p.43
A Reaction
[He cites Aristotle Met. 1019a8-10 in support] Close reading of Fine would be needed to elucidate this properly, but it is a suggestive line of thought about how we should approach grounding.