• Section 5 presents detailed experimental evidence for the terminology and applies it to exemplary cases covering small molecules of up to ~2,000 amu. While this Perspectives article focuses on the simplistic 1D 1 H NMR (HNMR) experiment in the (isotropic) liquid state, the same principles apply to heteronuclear spectra and, to an extent, to 2D/nD NMR spectra as well. This is true with the most widely practiced, pulsed Fourier