Comments on Higham and Heep (2017) : 'Reply to: "In the eye of the beholder: contextual issues for Bayesian modelling at the Middle-to-Upper Palaeolithic transition", by Discamps, Gravina and Teyssandier (2015)' - Discamps, Emmanuel; Gravina, Brad; Teyssandier, Nicolas (Routledge Journals, Taylor&Francis, 2019)