Is there any benefit to view the 3D (real) universe as 3D projective space?

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    $\begingroup$ I suggested closing this as opinion based, but it's also somewhat vague (you would strictly speaking need to supply a detailed theory to replace and compare with existing theories). As GR works well (4 dimensions) and replacements in e.g. string theory use as many as 26 dimensions, that's a tall order and beyond the scope of an SE to deal with IMO. $\endgroup$ – StephenG Apr 29 '19 at 10:43

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