what "chain of reasoning" was that, exactly, as I sure don't remember any
No problem! This'll be easy!
First go to my post 3516.
Now find the part you didn't have any answer for in your reply on post 3529.
It shouldn't be hard to find. It's the part in the middle. Just after the first thing you answered in post 3529, but before the second thing you answered in 3529.
Now wasn't that a cinch?