@FOUND SOUL,
No, but thanks a lot for helping!
The post I was looking for was about Calculus, not Leibniz' philosophy.
I think the post I'm looking for got deleted.
If they deleted, they would have deleted it because:
(1) It contained a lot of mathematical gobble-dee-goo.
(2) It contained a link to another Q&A site (a site where the gobble-dee-goo displayed correctly as mathematical notation).
It looked a bit like spam.
In any case, thanks to those who have tried to help. I looked under new posts as far back as they go, but couldn't find it. I would suggest people not spend any more time looking for it.
(Unless those women who would otherwise be playing you-know-what-game feel like searching it out for me. Those women should devote every moment to finding it. Give engineer and FBM some time to themselves.
)