the 110% PBE correction method is also more robust than the standard correction method when the training data is randomly subsampled. Figure shows how the corrected formation energy changes as the training data is randomly subsampled. For each correction method, the structure whose energy changes the most as the training data is re-subsampled, is shown in figure . In this worst-case scenario, using the 110% PBE correction method causes a 0.05 eV/atom change in the corrected formation energy (95% confidence interval). However, using the standard correction method, this figure increases to 0.22 eV/atom.