An actual good Quora question and good Quora answer

[flugendorf]

Just to note it down - this is a good answer, that I didn't have as such before. Heck, at all. I didn't know the basic 8", let alone have a grip on the difference he explained.

https://www.quora.com/On-Mount-Everest-an-observer-sees-the-horizon-roughly-230-miles-away-The-Earth-should-curve-35-000-feet-Why-doesnt-the-observer-see-the-curvature/answer/Curt-Thurston

He's a bit unkind with his last two sentences. The original person didn't know, and he asked in good faith... and speaking for myself, not only couldn't I have explained that well, you wouldn't believe the number of elementary things I haven't got the word about.

(It's actually most of reality.)

(And no, my ego wouldn't be eager to compare with anyone else, whoever they are.) (Sorry.  It's an ego. They pettily prickily do what they pettily prickily do.)