dualitynature

Sure it's arbitrary as it doesn't appear to really matter what we call it so long as there are two (e.g. light-dark, positive-negative, electric-magnetic, 1-0, etc...) The main idea is that 2 is a minimum number or quantity. Possibly the minimum number for any real thing which exists.

How can there necessarily be nothing? True vacuums are said to not exist and it is apparently inconceivable that the universe has boundaries. More so, I think that what we perceive as nothing is perfect harmony, which is the same as illusion and possibly also a value of 0 in mathematics. Additionally, even though the spaceship may appear to follow a straight course it is actually following that of a curved one as the medium in which the ship resides, or any medium for that matter, is within a spinning system. If attempts are made to travel in a straight line in a spinning system, instead a spiral trajectory appears. Since all circles are similar/proportional, then yes I guess it doesn't seem all that inconceivable that objects with similar speeds would have nearly similar attraction and repulsion properties, however density I think also plays into effect so would have to say, for all intents and purposes that the example given in wikipedia must be a generalization of proportions or ratios and not a specific.

They can only arrive at 3 by combining 1s and 0s.

I don't think so. Gravity is a property of matter energy, as is speed or mass. The gravity wouldn't change, I don't think, unless the actual amount of substance changed as that is the only way that would be to acquire more gravity. However Gravity is electromagnetic in nature, as all things are said to be and operate according to the wave principle the forces can be manipulated quite easily and seem to operate chaotically given the sheer amount of data needed to interpret any given system. So conceivably, since gravity is a wave which is unique in terms of properties but also similar in terms of it being a wave then conceivably, I would think that any wave or electromagnetic energy could affect any other electromagnetic energy in any number of infinite ways. If you think of space as a kind of bubble, rubber sheet, and/or membrane then large objects within that space would distort and effect the entirety of the rest of the space, like adding drops of water to a glass. The drops exists within the medium or "membrane" of a glass of water. The one drop affects the whole system. If an object is rotating it is influencing the shape of it's container or medium and dragging it with it, much like your finger swirling the water around drags water with it as it does so. So Yes I suppose. Idk lol, I just like talking about these things. Hope that help

Computers speak binary and they seem to do just fine.