In the current understanding of the authors, splitting of HNMR spectroscopic patterns cannot be observed experimentally at the level of transitions, because transitions are discrete entities (i.e., have zero width), whereas NMR spectra are non-discrete (i.e., exhibit natural line width) and lack sufficient resolution and sensitivity to observe the individual transitions. However, it should be noted, that in the case of a true first-order spin system and at an infinitely high magnetic field strength, a resonance pattern can be designated to be a triplet, with three peaks that consist of three lines but four transitions (two of which are degenerate). However, if the underlying two couplings are not identical, the two transitions are no longer degenerate and give rise to four lines, which, depending on the line shape of the measurement, can lead to a doublet of doublets rather than a triplet. However, it must be noted that, strictly speaking, all triplets are doublets of doublets, but not vice versa. Thus, a first-order analysis based on a visual inspection of the spectrum alone is inherently ambiguous.