The scaling of the machine-learned weights in Eq. 11 is important for the ability to predict correlation energies when the true value is much greater than those of κMP2. This situation is particularly pronounced when stretching bonds, see Fig. , where the ratio between the true and κMP2 correlation energies easily exceeds a factor of 4 once the H 2 bond is stretched. Without this adjustment, the MLS2's correlation energies could never be larger than those of κMP2, as w os (r) and w ss (r) derived from the sigmoid activation function are bound between 0 and 1.