"This is not the case according to Ichy's post. There is a lot of, as he put it, "fuzzyness" when it comes to classifying certain skulls."
That's because those skulls are neither chimp nor human skulls. They're something inbetween the common ancestor and a modern human skull, representing a point along the way on a smooth continuum, thus the "fuzzyness" that TOE predicts.
Are you giving up on your original challenge to it?