It's the how many sides of a coin question. There is only a right answer in the context, dimension and design of said coin. Two? 3? 5? 1?
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Still just a three dimensional object. 1D would be invisible. Humans do not create 5D objects. How many can visualize 5D?
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Replying to @billsdesk
And yes, Color Theory :)

Feb 19, 2017 · 2:20 PM UTC

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Replying to @mholzschlag
Helmholtz managed to trap color vision into the 3D RGB world. Theory does not accommodate tetrachromatic women.
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Good point! And, why I enjoy the edge ideas within the theoretical science. That anomaly becomes an opportunity for deeper study.
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