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RichGrinchlea t1_j2dwsld wrote

I'm going for the save here - I think he'd trying to say that you would infer that something was there by the fact that absolutely nothing is there - a null space. Like a black hole you can't see it but infer it's existence by knowing something should be there, even if it's the stars behind it.

This painted diamond I think would be obvious as it would be a big black nothingness in the middle of the room. It's black not invisible.

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