It is interesting to note the lack of shared compounds between the top-10 lists of the two proxies. By contrast, in previous tests, we found that increasing the weight of E pred (w E =2) led to significant overlap between the two lists, although with differing priority (i.e. the order of the rankings was different). Because the weights used can have a significant effect on the rankings, it may be worth probing several values for a given study to elucidate and assess behaviors. Indeed, as w E grows larger, it tends towards a classic approach of searching for high-performance candidates only, yet for very small values of w E , the performance of the topranked compounds may be too low to be of utility in real-world applications. The weighted RMSE for the validation data is 26.5 GPa; however, as mentioned in Section 2.3, the proxy error contribution is zero in this work.