The government didn't lie to me about the Earth being a sphere. I learned it in school as a little kid. And as an adult I've had direct observation of it.
Los Angeles is about 7 degrees of latitude further south than New York. If I plot a direct course between those two cities my initial course is 286° or a west-north-west course. My course doesn't turn southerly (less than 270°) until about the border between central Indiana and Illinois. I'm flying a curving arc. That's a proof the Earth is a sphere.
If I'm standing in my yard in north central Illinois on a bright clear evening, it's readily apparent that the stars in the sky are rotating circularly around Polaris (the North Star) as the night goes by. If I'm standing in Buenos Aries on a bright clear evening, it's readily apparent that the stars in the sky are rotating circularly around Alpha Crucis (the foot of the Southern Cross) as the night goes by. Neither of those two stars is visible from the other location. This is a proof the Earth is a sphere.
It's 2:36 AM in Singapore and dark. That's a proof the Earth is a sphere.
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