The theoretical and computational details of the present investigation have been described in references 1 through 5. The computations, as before, have been performed with the Gaussian program package using the DFT and TDDFT employing the PBE0 functional (which includes "exact" exchange, in contrast to PBE) and the 6-G31(d) basis set. The same computational package was used for the Møller-Plesset many-body perturbation theory of 2 nd order Zdetsis A. D. , Bandgaps of Atomically precise AGNRs and Occam's Razor 12 (MP2) calculations, with the same basis set. The visualization of the results was accomplished using the GaussView software. 2.5 Synopsis of the theoretical approach. For the atomically precise AGNRs examined here it has been illustrated that although the closed singlet is the correct lowest energy state, due to (inversion) symmetry frustration (which is also a sublattice frustration), open shell states, such as open shell singlet and triplet appear energetically lower due to better account of the Coulomb correlation energy (within the 1-electron approximation). Thus, such open shell states should be considered as "pseudo-states", and their resulting spin distribution within the one-electron DFT framework should be characterized as "pseudospin" distribution. The full amount (or most of it) of the Coulomb correlation energy can be estimated from the total energy difference of the closed singlet and the open singlet or triplet states. Thus, using standard DFT calculations (with functionals including exact exchange, such as the PBE0 ) for the closed and open singlet, and/or triplet states we can have a very good estimate of all ("surface" and "bulk") energy gaps, measured by STS as follows: