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Originally Posted by Master_Shake
Of course it would be a sphere! As a three-dimensional object the sphere would have to be constructed of something. Carbon atoms are just as good as anything else.
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A sphere is an abstraction though, an ideal representation of a shape to which many things are similar, but nothing really
is. A collection of carbon atoms in the approximate shape of a sphere is just that, a collection of things in an approximate shape.
A clearer example might be a Line, which clearly cannot exist having zero width, zero depth and infinite length. It's a useful abstraction though, a helpful model to have around. A sphere is a similar type of creature.