OK so water, if you look at in a glass, is concave relative to the edge of the glass, this should be done on the salt flats. Perspective is a key understanding. The action of taking the derivative through observation is fallible. Remember also that the measurement must include lift and sink in the footprint where the experiment is done. The topographical aspect of this experiment is key. Remember though, that these idiots are using "stupid" science for people that can not add or subtract without using their fingers.
It was your title that triggered me. I am on a mission to throw these people under the bus that advocate the nonsense of a flat earth. You are right though had I watched this, I would have had a different perspective.
Thanx @derekfreeman , I suppose if there is any point to be made, u gotta ask, if people are making videos like that, from such a respectable outfit, then is it any surprise that others will pull it apart and use it as ammunition. If there is an argument to be made, then it can be made with experiment and the demonstration of facts - drama is not a prerequisite of science, and assuming people are so dumb is patronising a whole generation into stupidity.
Anyway, the title is intended to pull in anyone flaking around the edge, in either camp, to pause a minute, think about it, then engage. I personally would rather be called a shill, or a devils advocate than leaning in any direction, I don't have a dog in the race, but I do have an interest in how it all pans out. Lets face it, if you believed in a globe earth any time before the 15th century, u'd probably be laughed out of town by any number of very smart people who would tell you exactly how it all worked. Both globe and flat were credible hypotheses, and both shared credible maths and physical models.
I would defend any flat earther against a globe earther if the globe earther uses bad science to argue, and I would defend any globe earther against a flat earther if the flat earther uses bad science to argue, it has nothing to do with what I personally believe, I don't use 'water-cup' logic, I just run the numbers.
The world is a strange place, and it certainly isn't all accounted for, so we should always tread cautiously.
"...assuming people are so dumb is patronising a whole generation into stupidity." I guess that is actually being done through the school systems.
As far as flat earth goes, I will stand up, with math, to any question. The entire generation of flat-earthers are so jaded by the lies that are given to us through corrupt governments that they are sucked into anything that is not mainstream. 500 years ago science was just starting to bubble into a froth and our knowledge was brimming with ideas, the walk away from the flat model punishable by the governments, since the heliocentric and flat earth were what all the failed science was based on, since the move into calculus, and the globe earth we have lost all the garbage science and replaced it with better science, In fact Kepler wrote the science of optics in a little over two weeks once the idea of spherical planets was accepted, and he was allowed to finish HIS invention, the telescope. While Galileo was credited with this, he was just a pawn in the game, Kepler took all of the data Tycho Brahe observed and created the, almost perfect, science of orbital motion and periods of the planetary motion.
Now I am in no way saying our current science is where it should be, in fact I believe we need to pay far more attention to magnetism than we do, but the reality is that, We are far more advanced than we were, when the flat earth was our basis. Flat earth changes our physical science and puts us backwards 500 years, and the entire system would need to be reconsidered. I do not think that needs to happen, in fact, in my opinion, we need to readjust the scientific system we have.
I can say without hesitation, we live on a spheroid and not a piece of paper. Without global spin, we would not have currents, well I guess I could go on an on but I'm sure you get the point.
You say you have no dog in this race, but maybe you should. Living without opinion on such a matter is, well, boring. Investigate and chose a point. Not believing in something is like not having any direction. In any direction, you are correct that the mindless approach they used was just as stupid as the flat earth idea.
Of course I have an opinion, it's just not pertinent to this argument :) Anyway, YouTube blocked that one also, so riddle me that batman O.o If that's not fair use for commentary, comment and education, then I'm a flower patterned tea pot, so I'll dump it on Dtube and back link to YouTube.
Hey, thanks for the feedback, you pushed me to justify my position, and that's never a bad thing.