In db_Errors project, I build a tree based on data in database dump. And in dump protected profiles are excluded, private and private with public bio don't have parent relations and all private profiles don't have marriages. So in absence of this data my global tree is smaller than Wikitree's. It's size is 7,028,366 out of 10M+ profiles. It could be called public global tree.
So profiles in question are connected to Kevin, but through private connections. In such cases, other connections could be found or error should be marked as false error.