Hong: what is the basis for 解 rather than 會? I assume this is based on the pronunciation xie4 = (o)e7, rather than jie3 = kai2, but according to my dictionary xie4 is only used for the surname and jie3/jie4 for other meanings.
Also, what is the character for Hakka hiau, e.g. hiau-tet?
www.ling.sinica.edu.tw/publish/LL2.2-09-Yang-paper.pdf
胡買切 has wendu of hai7(h+ai) but some baidu follow 下切字 only,so 買 sound match e ,ue and we of three sects.
My hakka dict has 13 sects which mentioned single word 知 ti1 is enough for 知曉。I think 曉 is hiau in both hakka and minnan