@gerrit Oh, not so long ago. The discussion gives me flashbacks of my preliminary exam in graduate school, over a billion seconds ago. The question was to draw an airplane wing and explain how it worked. I started talking about conformal mapping in the complex plane...

They said no, no, no, how does it work? I said the path across the top is longer than the path on the bottom and the also similarly interrupted with a "thank you, that's enough"

For some reason this is all I remember from graduate school (slightly exaggerating here)

I deleted the meta question because I feel I didn't explain my issue. It is something maybe I should have asked here if you want to leave me a tip about it