honest question: why do we keep quoting Eratosthenes? the shadow-and-well thing doesn't say what we say it says

Gonna get yelled at for this. People on our side love bringing up Eratosthenes — the well at Syene (Aswan, Egypt) where the noon sun on the solstice shines straight down with no shadow, and up in Alexandria at the same moment there's a 7.2 degree shadow. We use it to talk about the sun being local a……