Examining cases for or against homoplasy at designated DNA loci

Part of this topic is a carry over from the earlier topic of 12-repeat allele at DYS392 microsatellite of certain PN2 clades, including E-M78 [clickable link]

Argument #1 about the 12-repeat all at DYS392 : Characteristic of homoplasy...

— seems to reappear in different subclades of M78, particularly in regions where M78 appears to be fairly frequent [Cruciani et al.'s emphasis, 2008], but