By manually selecting data points associated with X C2H2 ≈ 1, one could obtain similar data sets compared to the data sets used to train the SISSO models for selectivity discussed in this section. However, such an approach would not indicate whether a new material, i.e., a material that was not tested in catalysis, is active. Conversely, the SG rules can be used to predict which new materials are active for the acetylene hydrogenation, as it will be shown in the next section.