Just a thought experiment, let’s say the earth is flat, looks like many professionals would know, including
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Pilots/ATC/sea captain
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Land surveyor and civil engineers
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Astronomers and Geologists, at least the one dealing with experimental data
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Militaries, at least radar operator and artillery
Just these categories are already a lot of persons, I assume I miss a lot of others. So how many person does it make in total ? 10 % of the population ?
Add the entire population of Denmark. Country is dead flat yet you can’t see one city from another one. Nor can you see the mountains of neighboring countries.
The Netherlands enters the chat.
Cue the Dutch that live 50m NAP. Sometimes it doesn’t even feel like you are a part of the same country… 🥲