Remember all those unique human hearing genes that evolutionists said must have undergone “accelerated” evolution because of human language, but then similar genes showed up in the gorilla too? Evolutionists had to conclude that not only was there accelerated evolution, but amazingly it must have occurred in parallel, in both the human and gorilla lineages. So if human language was the reason for the accelerated evolution in the human lineage, the cause in the gorilla lineage was “entirely different, but as-yet-unknown.”
Well now evolutionist PZ Myers is saying that spread out speciation processes and incomplete lineage sorting (ILS) solves the problem. The idea is that when a population gives rise to two species (cladogenesis) those two populations may not both include all the copies (alleles) of a gene, so particular genes may contradict the true evolutionary history. So if a gene fits the hoped for pattern, then they say the history of the gene aligned with the speciation event. But if a gene doesn’t fit the pattern, then they say it was because of ILS.
For added protection Myers throws in some meaningless barbs at his opponents (“Do you really think all the differences popped into existence simultaneously, at one instant when two populations of our last common ancestor discretely and completely separated? Of course not: you’d have to be a creationist to believe in something that stupid.”)
Myers needs the ad hominems because his ILS explanation doesn’t work. It’s a stretch to explain all the parallel evolution using ILS. But incredibly, Myers claims not only that ILS explains the results, but in fact it is all expected. So what was surprising and puzzling for evolutionists rapidly has become yet another confirmation.
Of course, as usual, the evolutionist’s certainty never came from the contradictory evidence that was force fit into just-so stories. It was from religion. As Myers concludes, “the observation of ILS contradicts creationism.” Well if that’s true, then yes, Myers is absolutely correct. Evolution is the right answer.
Religion drives science, and it matters.
[Reworded second paragraph]