You claim "flat". Would not be differences in elevation if it were flat. End of debate.
Accusation.
When people use sphere or say the earth is a globe, do they include differences in elevation?
70% water maintains its level. 30% earth have a common (boundary) level with the sea (sea level).
But rain can cause overflow.
If you want to carry your argument further, you can say that no object is flat under a microscope.
You claim "flat". Would not be differences in elevation if it were flat. End of debate.
Accusation.
When people use sphere or say the earth is a globe, do they include differences in elevation?
70% water maintains its level. 30% earth have a common (boundary) level with the sea (sea level).
But rain can cause overflow.
If you want to carry your argument further, you can say that no object is flat under a microscope.