Letter: In response to a recent letter by Prior et al. Issue 207 (November 2021) - van der Beelen, S.H.E.; Agten, S.M.; Suylen, D.P.L.; Wichapong, K.; Hrdinova, J.; Mees, B.M.E.; Spronk, H.M.H.; Hackeng, T.M.