This unbridged gap between the ape-like australopithecines and the abruptly appearing human-like members of our genus challenges evolutionary accounts.
If a few teeth of intermediate size and shape make “the most complete chain of human evolution,” then the evidence for human evolution must be quite modest.
This punctuated, even saltational increase in hominid skull sizes over time continues to be recognized in the literature.
William Lane Craig’s rhetorical strategy is essentially to accept whatever mainstream evolutionary paleoanthropology says.
I can hardly resist the temptation to say “I told you so,” or to jokingly remark, “Oops, they did it again.”