Good stuff. Wish the argument were recast in intrinsic form that avoids the schema of levels/types and metaness thohttps://twitter.com/meaningness/status/757578754348740608 …
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whoops, should have said “extrinsic coordinates”—it’s “systems” only in 4->5 specifically
perhaps s is best thought of as dimension of manifold you can move in at any time (which is identical for ex/int coords)
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