 Later, Benham et. al. (2014) have extended these methods to the Dirac delta function. This broadens the class of applications, and so strengthens the technique. However, it also becomes clear there, that there is a close parallel between (one large class of) Chunk and Permeate applications, and (consistent) non-standard analysis: wherever Chunk and Permeate takes a derivative by shifting chunks to one where infinitesimals are zero, non-standard analysis takes a derivative by defining derivatives to be “standard parts only”. Of course, equivalence between these two techniques does not show which is explanatorily deeper. Developments are to be awaited with interest.