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Some of the things that could have been addressed in the debate that probably won't happen because there are no flat-earthers who have put forth the effort it takes to conduct experiments regarding the shape of the earth, and have posted their work including data collected on their video channel (YouTube or whatever) -- AKA, Why Flat-Earthdom Syndromers Hate Facts and Models:
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Length of Tropic of Capricorn is about the same as Tropic of Cancer: 22,859 miles.
-- Impossible on a "flat" earth but no problem on a spherical earth.The sun always rises due east and sets due west on the equinox, all over the earth.
-- Impossible on a "flat" earth but no problem on a spherical earth.24 hour sunlight at the South Pole on December 21st.
-- Impossible on a "flat" earth but no problem on a spherical earth.Course bearing due west at equator requires no turns to remain on equator.
Same for course bearing due east on equator.
But this is not the case anywhere else on earth, where turns are required to stay on course.
Exceptions are north and south pole where no east or west exists.
-- Impossible on a "flat" earth but no problem on a spherical earth.Course due west from Santiago, Chile, no turns, eventually hits the equator.
Same is true for most other places on earth not starting on equator.
Exceptions are north and south poles, where there is no east or west.
-- Impossible on a "flat" earth but no problem on a spherical earth.Two parallel courses keeping the same rudder will eventually converge.
-- Impossible on a "flat" earth but no problem on a spherical earth.A large triangle on earth can be formed with 3 interior angles, each measuring 90 degrees.
That's only possible with a spherical triangle.
-- Impossible on a "flat" earth but no problem on a spherical earth.Constellations in the southern hemisphere appear at different Right Ascension.
Southern Cross at 2:00 from Perth viewed simultaneously at 8:00 from Johannesburg, S.A.
-- Impossible on a "flat" earth but no problem on a spherical earth.Celestial coordinates of sun from all over earth do not point to a nearby sun.
They can only be explained by a sun at enormous distance, like 100 million miles.
Every quarter moon the angle between sun and moon is over 89 degrees......
......That makes the sun 390 times further from earth than earth to moon.
-- Impossible on a "flat" earth but no problem on a spherical earth.