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No, the horizon does not always appear flat all around the observer regardless of altitude.
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No, the horizon does not "rise to the eye level of the observer."
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No, the natural physics of water is rather to conform to its container.
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Are you a Moslem? Because you're behaving just like one, defending the Moslems and believing like one.
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I see you are giving credit to the Flat Earth container once again.