138. Perspective is responsible for objects seeming to drop over the horizon

"Another favorite “proof’ of ball-Earthers is the appearance from an observer on shore of ships’ hulls being obfuscated by the water and disappearing from view when sailing away towards the horizon. Their claim is that ships’ hulls disappear before their mast-heads because the ship is beginning its declination around the convex curvature of the ball-Earth. Once again, however, their hasty conclusion is drawn from a faulty premise, namely that only on a ball-Earth could this phenomenon occur. The fact of the matter is that the Law of Perspective on plane surfaces dictates and necessitates the exact same occurrence. For example a girl wearing a dress walking away towards the horizon will appear to sink into the Earth the farther away she walks.  Her feet will disappear from view first and the distance between the ground and the bottom of her dress will gradually diminish until after about half a mile it seems like her dress is touching the ground as she walks on invisible legs. Such is the case on plane surfaces, the lowest parts of objects receding from a given point of observation necessarily disappear before the highest."

Just more unsubstantiated claims from Dubay.

Perspective will simply reduce the size of objects with distance.  Mr Dubay please explain the mechanism by which these imaginary girls feet will disappear.    Why would the bottom disappear from view before the top? If you are going to make up a new law, please explain how it works.

And a photograph showing invisible legs would be nice.

Instead of a photo we get a deliberately misleading diagram where the girls legs are progressively drawn arbitrarily smaller in proportion to the rest of the body.

A properly drawn diagram would be more like the one below

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