Here's one I'd be willing to bet on !

by dhunsber @, ¡Dondequiera que voy, estoy aquí!, Saturday, September 09, 2017, 08:25 (12 days ago) @ Mork

Oscar Sherman Adams - 1919 - ‎Conical projection (Cartography)
Any equal-area projection possesses this property, but it is not conversely true that any projection possessing this property is also an equal- area projection.

Right; don't trust the Mercator!

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