That's right, we see a sphere and measure it as such. Such an observation is accurate for our perceptions, fills our sphere-measuring needs, and allows us to use the thing as a sphere to construct a globe (or whatever it is one does with spheres)
But to say that the existence of such a sphere is truth, I think that's going too far.
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You know something, I don't think the sun even... exists... in this place. 'Cause I've been up for hours, and hours, and hours, and the night never ends here.
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