The conclusions made in Earth Not a Globe are based on empirical deductions from direct evidence.
Not in the slightest.
They are based upon the blind assertion that Earth is flat and then they attempt to make observations fit.
There is no justification at all for why perspective should have a magic preferential direction, nor any evidence that it does.
The only observation allegedly supporting it is objects disappearing from the bottom up, which is due to the curvature of Earth which he dismisses.
There is absolutely no evidence that perspective works the way RowBoat claims, while there is plenty of evidence to suggest it works the way mainstream science accepts it works.
It isn't even based upon magic perspective lines at all.
It is simply the apparent direction to an object. It is not treated as a separate issue of "how perspective works", it is simply what direction you need to look to see an object and by extension to see different parts of an object.
This real view of perspective works perfectly, and matches all observation, which FEers agree upon with the exception of things hidden by the horizon and stars and the like.
The really sad part is that it doesn't even match what is observed in reality.
In reality, objects disappear from the bottom up.
If RowBoats magic perspective was true, then they would disappear from the eyeline outwards.
There is even a good example of this on the page, but it doesn't go into the serious issues with it.
The centre disappears first, as it is aligned with the eyeline.
But that would leave a hole in the middle.
So the only way to actually have it disappear is if slices disappear, which then raises the question of what orientation it should be in.
There is no justification for any preferred orientation, so slices should disappear in all directions, leading to nothing being left to see.
If you ignore that massive problem and instead pretend the slice that disappears will be parallel to the surface of Earth, you are still left with a massive problem, buildings and the like should disappear from the eye level out. The middle of the ship should disappear first slowly growing outwards until it reaches the ground when it is far enough away.
Instead they disappear from the bottom up.
So this magic perspective clearly doesn't match reality.
(There is also the issue of the stick magically growing longer as the circle shrinks which is completely unjustified as well).
But there is another big issue.
Notice how the lamp posts line up in this image:
http://www.sacred-texts.com/earth/za/img/fig77.jpgIt has the tops all line up in a straight line.
The only thing he attempts to explain here is why it disappears from the bottom up.
But this doesn't happen with the power lines. Instead there is a clear curve.
There is no justification of why this should occur from the FEers.
If this curve is the work of magic perspective, then many of his claims no longer indicate a flat Earth. instead they would indicate a concave Earth, and these curved powerlines would raise a similar issue.