@John_Harshman
@Mercer
Thanks for the reference. It led me to creation.com and videos and webpages on speciation and kinds.
I see that on creation.com they prefer to use the term “speciation” rather than “microevolution” (which I used to see in previous generations of YECs). That is, they do not regard the diversification of animals after the Flood as “evolution,” and therefore don’t see themselves as compromising with falsehood. (Not all creationists agree this; their website indicates a rancorous disagreement with Kenneth Keathley, who charged them with compromising on “evolution.”)
So yes, the YECs today (at least, at creation.com, which seems connected with the Ark Encounter) speak about what people here would call rapid “evolution” but which they prefer to call something else.
They do say, however, that however rapid the diversification, it is all from original created “kinds.” When asked what “kinds” correspond to, they say that there is no direct equivalence with our current classification system, but they do seem to think that new species and genera have come into existence, and so in many cases, the created “kind” would have been approximately at the level of “family”, but it’s not a rigid equality. Perhaps some of the “kinds” were broader than that, some narrower. It’s clear from their discussion, however, with its examples of cat kind and (at the broadest) the whale kind, that they don’t envision the “kinds” as broad enough to match our “classes”. It seems to be a floating boundary, somewhere between genera and order.
So they envision very rapid evolution — oops, speciation — after the animals left the Ark, such that tens of thousands of species arose from the pairs on the Ark. And this process had to happen within 5200 years (taking the earliest date they give for emerging from the Ark) or within about 4500 years (taking the latest date they give). So in round numbers, that’s only 5,000 years to generate all our modern species, most of our modern genera, and some of our modern families (in lines where the created kinds were roughly on the level of orders). I leave it to the geneticists here to calculate the plausibility of such rapid diversity, if only natural causes known today were at work.
It’s worth remarking, however, that we have a fair number of paintings, statues, mosaics, etc. of animals (cats, dogs, livestock, some wild animals) from ancient Egypt, Mesopotamia, etc., sometimes fairly detailed images, and so can get an idea of the diversity of animals that existed from 1,000-3,000 B.C. I haven’t studied this artwork, but if it shows that already by classical Egyptian, Babylonian, Akkadian, etc. times there was animal diversity comparable to ours today, that leaves a smaller window for hyper-rapid evolution, maybe only 1,500 years or so.
So the question I would put to these people is: are they talking about purely natural diversification, or are they talking about miraculously assisted diversification, i.e., “guided” speciation? If (for the sake of argument) our best science rules out purely natural diversification (on the ground that 5,000 years is too short a time), then they must be insisting on miraculous assistance. But of course the Bible does not mention any such assistance, so that would be departing from rigid literalism. What would justify such a departure?
It seems that the only thing that could justify it would be the axiom that the Bible can never teach anything false, and so, if the only way the Bible would not be false is if God speeded up speciation miraculously, such miraculous intervention, though never mentioned in the Bible, would have to be inferred. But as soon as one starts invoking “the Bible can’t be false” to deal with a scientific difficulty (not enough time for speciation), one’s “scientific creationism” is clearly not limiting itself to what can be proved by science alone, without reference to the Bible.