Well if you want to argue that, then we are going to have to expand what is human. We will have to include all of Homo, to Homo habilis (Homo habilis, Homo rudolfensis, Homo cepranensis, Homo erectus, Homo heidelbergensis, Homo rhodesiensis, Homo neanderthalensis, Homo ergaster, Homo georgicus, Homo antecessor, Homo sapiens idaltu, Archaic Homo sapiens, Homo floresiensis). We are also going to have to include all of Australopithecus inculding: A. anamensis, A. afarensis, A. africanus, and A. sediba.
Which I am completely fine with, because they where all humans. The simple problem with that theory is that it will be impossible to get any christian to believe it.