#### Dale

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You have a non-abstract physical table. That physical table has a flat surface and four legs that are perpendicular to the surface, parallel to each other, and equal in length.I don't disagree with this. I just have a hard time with what it means, it's kind of abstract.

Physics involves geometry. That is spacetime. Yes, we do use mathematical abstractions to represent it in our theories and analyses, but what the abstract math represents is every bit as concrete as the table. Geometry is clearly part of the physical world.

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