The claim was that rail works if there is enough traffic between two points. That claim is false. It's false even if it's the same traffic at both points. Hu

The claim was that rail works if there is enough traffic between two points. That claim is false. It's false even if it's the same traffic at both points. Hub and spoke is a specific kind of a set of pairs of points. (One point in each pair is in all members of the set.) Hub and spoke doesn't work unless there's enough traffic to each of the endpoints.