On Saturday, January 19, 2019 at 5:20:16 PM UTC, Philip Thrift wrote:
> On Saturday, January 19, 2019 at 5:42:12 AM UTC-6, agrays...@gmail.com 
> wrote:
>> Since it seems conceptually impossible to model a theory with DISJOINT 
>> discrete spatial units, thus requiring the units to be juxtaposed, do such 
>> theories acknowledge difficulty of motion between the units, which might or 
>> might not have boundaries? TIA, AG
> In quantum space or quantum spacetime approaches (like loop quantum 
> gravity, casual dynamical triangulation), space or spacetime is in really a 
> collection of 3D or 4D *cells *(tetrahedra or pentahedra) that are 
> "glued" together somehow.
> There is no "space"  in the conventional Euclidean of Riemannian  
> geometrical/metrical sense, so these cells aren't *in* space (there is no 
> space inside of them or between them). The cells collectively *are* space.
> - pt

*I know. The alleged cells aren't IN space, but collectively ARE space.  
But they can't be separated. If they were, light and material bodies would 
have to traverse a Void of Nothingness to get anywhere. Motion would be 
impossible. OTOH, if they're juxtaposed yet somehow distinguishable, they 
would have to have boundaries, another big conceptual problem. I find the 
idea of discrete spatial units, either juxtaposed or not, conceptually 
unintelligible. AG*

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