RE: Time, Causality and Demand-Pull
The main point of dispute over the PSL Core seems to be whether or not it can be extended to model situations involving relativity (where there is no absolute time). Sowa is worried (or convinced?) that it cannot, and the PSL Core designers are perhaps beginning to admit that no extension to the Core can model relativity, but they consider that unimportant for what it was designed to do.
Is this a correct description of where the argument stands now?
John A. Thompson
Mathematics & Computing Technology
The Boeing Company