Probably best to read the paper. I personally don't find it very convincing, because of the many speculative premises. But that is not a refutation. Here it is

Probably best to read the paper. I personally don't find it very convincing, because of the many speculative premises. But that is not a refutation. Here it is: https://faculty.ucr.edu/~eschwitz/SchwitzPapers/SubstrateFlexibility-260528.htm https://faculty.ucr.edu/~eschwitz/SchwitzPapers/SubstrateFle...