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The discussers welcome the paper by Burgess et al.(2019) and appreciate their efforts to develop, presumably, the first probabilistic seismic slope stability design aids using the “random finite element method”(RFEM). Although they conducted a parametric study, their charts provide geotechnical engineers with a preliminary estimate of failure probability of simple slopes subjected to seismic excitations. However, some considerations need to be pointed out that may affect the results achieved in the paper under discussion.