I feel kind of silly because I did not see that the photo of the mast is enough, but now I see it clearly. The photo is really difficult to fake, you are telling us where it came from, and it debunks the "perspective" argument from Rowbotham easily.
Only because you both persist in believing the faulty, theoretical "law of perspective" taught in art schools,; all parallel lines do not meet at the same point of the eye line as Rowbotham clearly demonstrated.
False. Rowbotham was just trying to account for the sailboat masts.
For example, he uses the following diagram.
Notice how he draws the bottom disappearing, but not the (larger) top. The angular diameter of both the top and bottom is roughly the same at far distances, so they should be equally shrunken, yet they are not in the diagram.
Similarly in
,
The girls head should be as invisible as her feet.
Similar discrepancies between the top and bottom of:
Since nothing is blocking the bottom of these pictures, their bottoms should be as visible as their tops, especially clear when viewed through binoculars.
Need more?
Think of looking at an airplane through binoculars. The ends of the wings or tail or nose are never "cut off", no matter the angle of viewing, because there is nothing between the plane and you. Similar distances are involved. The boat I saw must have been less than 7 miles from me, and commercial planes fly at over 6 miles high, and are often farther than that from you due to land distance between you and the plane.
By the same logic, you should be able to see the hull of the ship from any angle if there were nothing between you and the part of the boat you are looking at.
However, my photos clearly demonstrate that the large hull of the ship is invisible, even though you can see the thin mast all the way down to the water. Therefore, something must have been between me and the boat, which is water. This is zetetically observable.
Since I viewed the boat from five feet above the water, and the ship's hull rises at least five feet out of the water, the water between me and the boat must be convex. Similarly, when the same phenomena is viewed anywhere else, the water is convex. Since this is visible all across the earth, the earth as a whole must be convex, a globe.