Quote:
Originally Posted by moo buckets
Doesn't matter. If it's curving, then it should be observable at a smaller scale, but it can't be.
Aside from the obvious point already made (that the "smaller" scale of the horizon showing curvature of the earth), your statement is literally not true. Frequently in fact, we have in the course of human history lacked the technology to view things at "smaller" scales.
Beyond that, a straightforward way of perhaps recognizing that this particular point of yours isn't very strong:
Think about a slight but constant curve drawn on a piece of paper, something like this:
Now, cover up all but a very very small part of it with your hands.
Note that it looks like a straight line.
The surface of the water that reflects your face is just like that, except zoomed way way way way way farther in so it's even more approximate to a straight line.
I'm sure that if you ever took calculus you've by this point disavowed it as garbage, but this is the same as approximating (hyper locally) a curve with its tangent line.