clipka wrote:
> Kevin Wampler schrieb:
> 
>> I think that this becomes problematic for measuring between points 
>> which aren't connectible by a lightlike geodesic, but maybe there's 
>> some clever way around that (although I don't see how).
> 
> Well, if two points cannot be reached from one another - is there /any/ 
> way to assign a distance to these points at all?
> 
> So I think this is a non-issue.

In this context a lightlike geodesic refers to a path in spacetime which 
  light would follow, and I meant to imply that defining the distance 
between points which could only be connected by going *slower* than 
light would also be hard to define uniformly.

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