[VadeRetro]

VadeRetro: What is the barrier that prevents "microevolutionary" changes from accumulating indefinitely to "macroevolutionary" in reproductively isolated populations?

[picture of actual fossilized series follows]

Aquinasfan: The minor problem of the lack of fossil evidence, your example of the shell notwithstanding.

No! No! No weasely escapes. The state of the evidence, no matter how you lawyer it, cannot be a real-world barrier.

Darwin was puzzled by the fossil record, but he was only the first evolutionist. Real-deal scientists of today are not particularly baffled by the fossil record we see. For the most part, you just have to know where to dig.

The state of the evidence is not a barrier. What is the barrier?

Just an aside: what if the lurkers aren't as dumb as you're clearly hoping?

[VadeRetro]

Darwin was puzzled by the fossil record, but he was only the first evolutionist.

Strictly speaking, Darwin was only the first Darwinist.

It is a feature of creationist arguments that every puzzlement and every dispute that has ever taken place among evolutionists since 1859 lives on--in creationist arguments.