Levels don’t measure the surface of Earth
So why do you continually pretend they do?
Levels measure for the direction perpindicular to ground.
which is flat and level, not curved as a ball.
Then why does all the evidence which can distinguish between the 2 show it is curved like a ball, and none show it is flat?
Measuring for level will match up to the Earths surface
No, it doesn't.
It matches up to a hypothetical level surface.
All it takes to show that is BS is to look a hill. Or, get a level and put it on a hill.
Measuring for level will NOT match Earth's surface.
Now again, care to admit your claims about aircraft allegedly needing to constantly descend is pure BS, because an equivalent argument can be made that they had to constantly ascend?
Planes would have to constantly descend if the earth was a ball. They don’t need to fly in a constant descent because earth is flat, not a ball.
Why would planes ascend to fly over a ball earth? A ball constantly curves downward from any point on or above it.
The first path over a ball is constantly downward, and so is going back in the opposite direction, or any direction at all.
It’s obvious that I meant earths surface was flat in overall terms, mountains are not flat, I shouldn’t have to explain what I meant by being flat to you, so drop the bs about what I said, unless you really think I’m saying mountains are flat, which would make you an idiot, since everyone knows mountains aren’t flat, so it’s obviously not what I was referring to as flat. Sheesh you waste my time with such bs, use your brain once in awhile, it’ll help you avoid such minutiae arguments!!
Okay, so what is perpendicular to the surface?
A straight line, upward, from a single point on the surface, straight up, right?
So what is level to that straight up line from the surface?
Another straight line, 90 degrees to the first line going straight upward, right?
Yes, and that is what levels measure for both lines, one straight up, one straight across it, or perpendicular to it, at 90 degrees, which we call ‘square’ to it.
Squares are also flat, in all directions, all sides of it, which are all perpendicular to adjacent sides of it.
A line from the surface is a single point, straight up. Being level to that straight up line is a straight line perpendicular to it, 90 degrees to each side of that line, which must be flat and horizontal to it, and that, indeed, IS level.