In 1961, Roberts and Salzberg noted that the "...first order component of a multiplicity is field independent...", that this applies "...when the chemical shifts are large...", and further emphasized that "...the higher order effects are field dependent" . The theoretical situation of a true first-order spin system may serve as an approximation, but also as a reminder of the fact that, in practice, the number of transitions almost always exceeds the number of lines, just as the number of lines surpasses the number of peaks -often by an order of magnitude between both modular stages. For an experimental example, the reader is referred to the case of strychnine presented below. Regardless of how well resolved the spectra are, whether peak patterns are sufficiently split and/or single lines can be distinguished, the number, intensities, and frequency distribution of the QM-based transitions provide the ultimate explanation for the NMR spectrum.