Comments by "H. de Jong" (@h.dejong2531) on "Flat Earth Theory - How Was It Debunked 2,000 Years Ago?" video.

  1. Anyone can use simple tools to find Earth's shape. And every time we do that, we find that it is curved, not flat.
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  2. Gravity pulls water into a sphere. This is what 'level' means: a surface on which every point is at the same distance to the center of the planet, i.e. a spherical surface.
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  3. Every single one of Dubay's "200 proofs" has been DISproven. Anyone can do simple experiments that reveal Earth's shape. Every time we do that, we find that it is curved, not flat. Because anyone can do these experiments, it's not possible for anyone to 'keep the truth from you'. We can verify, and heave verified, that people who tell us that Earth is a sphere speak the truth. We have verified that Eric Dubay lies.
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  4.  @marcwoodward850  That is incorrect. No amount of zooming in will bring a ship that has gone over the horizon back into view. There are videos that claim to show this, but every single one of them zooms in on a small boat that has not gone over the horizon yet. The correct way to do the experiment is to follow a large ship, wait until the horizon has hidden the hull from view but the superstructure is still visible, and then try to zoom in. Every time we do this, the hull does not come back into view. A demonstration of this is "Does More Zoom Cause Ships to Come Up Over Horizon? Flat Earth"
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  5. ​ @marcwoodward850  The human eye does noes not have a fixed "vanishing point". Instead, how far we can see depends on how large the target is: the bigger the target, the farther away it can be and still be visible. An ant is invisible to the naked eye at 10 meters, while a mountain can be visible at 100 km if you have a line of sight. The Moon is visible at 380,000 km. The horizon has nothing to do with this: all ships, large and small, start to disappear from the bottom up at the same distance (5 km if you're standing at sea level). The fact that ships disappear from the bottom up instead of all at once again indicates that the horizon is not caused by any limit of the human eye. The fact that ships come back into view when we climb to a higher elevation is another indication that the horizon is not caused by any limit of the human eye.
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  6. Dozens of people have flown over Antarctica, mostly as part of flights that circumnavigate the planet via both poles. That hasn't stopped the flat-Earthers, they just ignore this evidence just like they ignore all evidence. Antarctic flights are only one of a dozen methods we can use to prove Earth is a sphere.
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