If it was flat, you could always see mount everis
Perspective, vanishing point, weather, atmospheric anomalies, etc. limit how far we can see.
Even with a telescope you can only see just so far.
RESEARCH FLAT EARTH
https://www.youtube.com/results?search_query=%22flat+earth%22
Bonus humor: https://bitcointalk.org/index.php?topic=1893802.msg18991779#msg18991779
Now if nomad13666 could see past his nose, he would realize there isn't any flat earth... anywhere.
