Second, the zero-point energy is removed from eq. 6 because it is effectively contained in the CNEO potential energy surfaces (this involves dropping 1/2 and replacing exp(-ℏω X i /2k B T ) by unity in eq. 6). Removing the zero-point energy from eq. 6 prevents double counting because CNEO methods transform the classical potential energy along the reaction coordinate to a zero-point-energy inclusive effective potential, allowing a classical treatment of dynamics on the effective potential.