Going to the QM-based level of transitions, it is equally important to realize that lines and line shapes result from both the inherent properties of the resonating nucleus and the spin system it is embedded in, which determines how many transitions result, how the lines are located relative to each other, and what their relative intensities are. The overlap of all transitions produces an envelope with a certain resolution that can be observed depending on the quality of the spectrum. This explains why the splitting of patterns can occur at both the level of peaks and lines, which once more highlights the ambiguity of the term splitting. Its proper use, therefore, falls into its context.