One thing that Flat Earthers claim they understand is the curvature / drop off point of the Earth. They really do believe that the 8 inches per mile squared is how the Earth is shaped. No, I'm serious. They think the Earth has the shape of an infinite parabola. To calculate the Earth as a circle is out of their understanding of math.

So with that said, of course if you use a parabola, the drop off point comes *much, much* sooner. Unfortunately, since the Earth is *really, really* big, the curvature / drop of point isn't noticed at close distances.

So, to say that the point of visibility drops off at 8 inches per mile squared is either a lie, or a complete misunderstanding of the shape of a circle.

In fact, I was being generous when I drew the circle parabola figure on the right. Then, I did something more interesting. I actually did some real math, believe it or not. What I discovered was astonishing.

Not only are the Flat Earthers using an equation that doesn't match the circle model, but they also don't seem to understand how large the Earth actually is.

See images below of the calculated parabola of which they speak.