Just where are the 4 corners of the Earth?
According to the FE model, the Earth is shaped like a coin, so there are no corners.
Technically, that is correct with respect to most schools of Flat Earth thought, but the important thing is bear in mind the difference between the Earth from the entire World when speaking of corners.
Strictly speaking, the Earth consists of the three continents of Asia, Africa, and Europe. These together form a circle. Hence the T-O World maps, the essential Mappa Mundi. The flat circular Earth does not include the ocean and islands round about it.
The World which we live in is composed of the Earth and the Seas or Great Ocean around it including the islands therein. Around this Ocean is an outer Earth or perimeter. This perimeter is rectangular, and therefore it does indeed have four corners. These corners are not depicted on globes, and there exist vast areas of largely uncharted Ocean unknown to most men and which globular cosmography was deliberately designed to conceal.
Newfoundland is not one of the corners as the entire northern area of the Atlantic Ocean on modern globes is not anywhere near the western edge of the World. As South America is one and the same with the ancient island of King Atlas (i.e. Atlantis) renamed after Amerigo Vespuccia about 500 years ago, this island continent lies in the West towards the western edge of the World. Tierra Del Fuego and "South" Georgia are both closer to this edge than places like Columbia and Venezuela. The island continent which was renamed "Australia" about two hundred years ago lies towards the East.
As Saint Brendan in the sixth century sailed throught a door at the western extremity of the World, and returned and sailed all the way to Paradise which is in the East before returning to Ireland, his understanding of navigation and World geography is superior to the Muslim influenced cartography of the late Midle Ages which is the basis of modern geography.
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