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A Brazilian philosopher who lives in USA (Virginia, more specifically) posted the other day the following on his Facebook (translated to English):
"I didn't study the issue about flat earth. I've just watched a few videos of experiments that show the flatness of the aquatic surfaces, and I couldn't find anything to refute them so far."
A PhD in geology from Universidade de São Paulo (USP), one of the best universities of the last decade (in top 100). He says there's no way the Earth is flat because navigators used to be guided by astrolabe, an instrument developed for a flat earth model.
Also, there's an ultimatum:
I really doubt someone here can refute flat Earth theory.
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