Another point we want to emphasize here, as Figure shows, is that the identity of one monomer does not correlate with the oligomer's triplet ground state stability, and it is the combination of the two monomers that overall dictates the oligomer's properties. While we presented here various monomers that were common in the GA (Figure ), not every oligomer with them had a small HOMO-LUMO gap. For example, monomer 642 was the most common monomer in the GA and in the top 20 oligomers, but when combined with monomer 659 it had a GFN2-xTB HOMO-LUMO gap of 1.22 eV -which would correlate to ∼5.5 eV DFT HOMO-LUMO gap, according to Figure , and a more stable singlet ground state than a triplet one, according to Figure , by ∼2.0 eV.