By adding a GLPT3 (third-order Görling-Levy perturbation theory, or KS-MP3) term E3 to the XYG7 form for double hybrid, we are able bring down WTMAD2 (weighted total mean absolute deviation) very large and chemically diverse GMTKN55 benchmark an unprecedented 1.17 kcal/mol, competitive with much costlier composite wave function ab initio approaches. Intriguingly, (a) introduction of makes empir...