Of course it is pronouncement that I can’t prove or disprove. Atheism is an opinion that you can’t prove or disprove. So is theism.
The argument here is whether you can get the main characters (Adam, Eve and the talking snake) of the Genesis story into the genealogy of actual human history. The whole purely mathematical discussion of whether a mated pair of some species of the genus homo can lead to every human being that ever lived is not what you are after. You need to get the Genesis story characters into human history. Mathematical modeling with genealogy is not enough.