.
You did not read far enough in the metabunk forum. A few posts accused them of not having a level laser. BTW a few dozen meters with one centimeter's error (or even one millimeter!) would not ensure a level instrument for projection across several kilometers. They would have needed to establish less than one millimeter variation over 300 meters, by checking in opposite directions, before they would have reasonable assurance of an adequately level laser. Then their accuracy would have been within 3 millimeters in one kilometer or 6 in two or 9 millimeters in three kilometers.
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Unless it was a hoax, the measurements I saw on the video insured that the laser was adequately level.  They were taken at many regular intervals, including ones very close by, and if anything the laser rose very slightly within the first couple interval measurements so that this should cause it to rise even more as you went farther.  Posters on metabunk were simply saying what they wanted to be true.  You're very emotional about this subject as well, so I do not trust your judgment either ... just as I don't trust the judgment of the people on metabunk.  I'm seeking the truth in this matter and am not interested in emotional rants from either side.  So, for instance, the evidence is almost irrefutable that 9/11 was an inside job and that the US moon landing was a hoax ... and yet you'll find tons of clowns out there trying to "debunk" the evidence and pretending to be objective scientists.

Basically, if the Hungarians were deliberately skewing the laser, they would have had an extremely difficult time creating the precise downward angle that would project itself into just a few centimeters at their farthest distance; they would have hit the water WELL before that point.  They would have had to plan this out well before hand, do a pre-run a several kilometers out and then adjust the laser to hit the target FIRST and then come back and stage the experiment.  Again, I am not ruling out a hoax ... where they did exactly that, but, absent a hoax, the evidence is very convincing. 

Basically this works like a gun sight; if you can hit the first two targets precisely, then the subsequent targets are going to be in line.

Define "up".

Go on.

Sideways? Relative to what?

Relative to a line parallel to an assumed flat Earth?

Sideways relative to the alignment of my body?

Why are you having such trouble grasping that a direction is not an absolute but a relationship between two points, from one toward another? Of course going to Heaven meant going "up", because that's what "up" meant: the perpendicular  direction from the Earth towards the heavens. It's a tautology. And this definition applies is a spherical model of the cosmos (which was the Medieval view), and does so far more elegantly too.

"Relative to what?"  Words only a globalist would say and such a modern notion often conveniently transposed onto morals.  Direction is absolute on a flat geocentric earth.  Up is up, to heaven, above the head.  Down is down, to hell.  West is west, where the sun sets.  East is east where the sun rises.  Simple. 

You have the capacity for logical though of a five-year-old. Direction is by definition a geometrical relationship between two points in a space. Stop being a buffoon. It's impossible to specify a direction without specifying it in relation to two points, and you IN FACT do exactly that in your "flat Earth" model
Up is up - a meaningless tautogoly.
Up is toward heaven - establishing relativity and conceding the point
Above the head - the direction of my head changes, so either "up" changes, making it completely arbitrary relative to the abritrary position of my head, or "above" means the same thing as "up", making it circular.

Note how I did not state that the location of Heaven and Earth are not absolute and objective realities, or something "relative".

Direction is necessarily relative on a ball: For those on the top, up may be up, but to those on the bottom the top guy's up is the opposite direction for them and therefore, down.  The guy on the side's 'up', is not up to the guy on the top, nor to the guy on the bottom.  There is no top, no bottom, no up, no down, no east, no west, no north, no south, no horizontal and no vertical, on a ball.  Its all relative.    

No: DIRECTION is IN PRINCIPLE a geometrical relationship BETWEEN TWO POINTS. This has nothing to do with any choice of geometry or cosmic model. Heaven is where it is,a nd the Earyh is where it is: but the direction from one to the other is a function of their respective positions.
But this is a pointless discussion as it's clearly all flying over your head.

Again: define them abolutely. You can't do it, but you're too dense to understand why your attempts at it are inadequte.

I did.  Up is above your head.  Where heaven is.  Down is down, where hell is.  East is east where the sun rises and west is west where the sun sets.  Get off the spinning ball and you'll know which end is up. 

Ye gods, you are a moron.

You don't get the point of the diagrams I posted or what I'm saying. Your comment is irrelevant to them. The questin is, since you're continually taking terms, viz. geometrical objects, defined in relation to a flat model and projecting them into a spherical model, what are the correct transformations to be employed in this projection? They are arbitrary. We could just as well use eithe rof these:



When I perform a handstand on a flat Earth, is up still above my head?
If yes, how is "above" distinct from "up", and how does this then constitute a defintion?
If not, how does this constitute a definition?

And this is just a series of non sequiturs. Again you're implicitly projecting a flat model over a spherical model in order to define terms in the spherical model, and its leading you into confusion.

Up is up above your head when you don't flip upside down.  It really isn't all that hard.  True is true.  Level is level.  The horizon is horizontal, etc. Unless earth is a ball. Then things get real dishonest. Because up/down/good/bad is whatever you make it, relative to all, even non-existent.  The spherical, spinning, rotating earth is Satan's re-creation of earth in his own image.  And its chaos.  Even a stationary earth ball carries that chaos into the void of ridiculous and leaves everything in doubt.  You don't have to bullwhip me calling me names in order to get your point across.  I just don't buy it because its nonsense.