In this, the final part of the Three Articles series, Adam presents an article discussing chord progressions and tonality in pop music. Ben Duinker writes about how chordal loops can increase ambiguity when locating tonic and that we should consider bitonality or "hybrid tonics" when thinking about pop music. https://www.mtosmt.org/issues/mto.19.25.4/mto.19.25.4.duinker.html