One of the few lines of defense left is a fictional distinction between microevolution and macroevolution. Both are big words so they must be scientifically sound! Out of necessity they admit that small scale changes are possible (the kind we can observe in our lifetime), but deny that species can undergo great change.
The catch line goes, "a dog can turn into a bigger dog, but it can't turn into a cat". It's wonderfully effective. Use two very common everyday animals and people start thinking about what's directly in front of them. Dogs can change into bigger dogs? Alright, I have seen that happen! Turn into a cat though? That's preposterous; it's crazy talk! The catchphrase creates an immediate reaction, that of distaste for an idea made to look absurd.
What it successfully blindfolds people from seeing is the vast amount of time it would take for a species to change like that. If a dog can change into a bigger dog, it could also change into a smaller one, which could change into a lighter more ambidextrous one, and after billions of years under the right conditions, something resembling a cat. Macroevolution IS microevolution, there's just more time involved. If genetics can change a tiny bit in a short time, they can change substantially given vast amounts of time.
Microevolution is a flimsy way for Creationists to draw a distinction between genetic change they can't deny, and a full on hedonistic belief in evolution they can't admit.
For the visually inclined creationists out there, click the link for an illustrated explanation!
Any thoughts on how I can improve the wording on the image to make it more effective?


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