First, switching from the standard to the 110% PBE correction method, several structures that were previously proposed as possible discoveries of new, stable materials now appear to be unstable. Figures and show binary phase diagrams for copperbromine and copper-sulfur, respectively. The blue points are from the Materials Project database, and the purple points are from the GNoME database. Any purple point below the blue line would constitute a new stable material, discovered in the GNoME project and not previously known by the Materials Project database. In figure , there are three purple points on the right side that represent new discoveries by the GNoME project, which used the standard correction method. These are predicted to be stable by 0.5 eV/atom below the previously known convex hull, which is a very large value. However, in figure , those same three points are shown using the 110% PBE correction method, and the structures appear to be slightly unstable or very close to the previously known convex hull.