As discussed in Ref. 1, GEO and GEO values increase with the molecular size. That is why the GEO absolute scale has been introduced as the GEO values relative to it do not increase as molecules grow. To introduce the absolute GEO scale, we first define ∆G as the error in approximate geometry: ∆G = G-G 0 . Setting ∆G = γG 0 , produces to second order in γ: