“…Nevertheless, controversy regarding the concept of sonority continues (e.g., Parker, 2012b;Rahilly, 2016). For example, the consonant /s/ shows conspicuous behavior that does not fit into sonority scales in Indo-European languages as well as in other languages (Goad, 2016), the sonority scales proposed by phoneticians are slightly different from each other (e.g., de Saussure, 1916;Harris, 1994;Selkirk, 1984;Spencer, 1996), and the arguments about the concept of sonority tend to be circular (Rahilly, 2016).…”