In both the tree and the linkage approaches, genealogical subgroups are strictly defined by their shared inheritance from a common ancestor; simply, although trees entail that all proto-languages must be discretely separated, the linkage model refuses to make that assumption.
Genealogical subgroups are strictly defined by their shared inheritance from a common ancestor. This was in both the tree. This was in the linkage approaches. All proto-languages must be discretely separated. Trees entail this. The linkage model refuses to make that assumption. This is simply.