PIE root shapes
From User talk:Rua
I was reading through cat:Proto-Indo-European irregular-shape roots and I noticed *wreyḱ-, *wreyt-, *mlewH-, and *mreǵʰ- are considered irregular. According to w:Proto-Indo-European root#Sonority hierarchy, these should be considered legal, and LIV certainly has many such roots. Should we change over to a classification system that distinguishes R and M?