[acenes]

Sorry, but "back of the napkin" calculations are quick order-of-magnitude type estimates based on reasonable guesses or first principles, not by looking up numbers on the web (napkin not big enough to write out URLs; maybe use envelope)

[Talanes]

Are you really trying to gatekeep "back of the napkin?"

[sidlls]

How is it gatekeeping? We don't call estimates sourced with references "back of the napkin" calculations because they aren't.

[Talanes]

It was a small handful of quickly searchable numbers, not an in-depth review of sources and data.