Parameter conditions and representative activity plots of an allosteric molecule exhibiting AND logic in the absence of the third ligand, while exhibiting OR logic (A,B) or YES1 logic (C,D) when L3 is present at a saturating concentration. Parameters used were KA,i = 2.5 × 10−8 M and KI,i = 2.5 × 10−4 M in Panel B, KA,i = 2.5 × 10−8 M, KI,1 = 2.5 × 10−4 M and KI,2/3 = 2.5 × 10−6 M in panel D, along with ∆εAI = −12 kBT in both panels.