In this provocative work, Luigi Burzio argues that many common assumptions within stress theory, and phonological theory more generally, are in fact rather arbitrary. He proposes radical departures from recent tradition. In Part I he analyzes stress in the underived English lexicon, arguing that the basic accentual groups or "feet" are not monosyllabic or bisyllabic, as often assumed, but rather bisyllabic or trisyllabic.