Quote Originally Posted by loky1109 View Post
If there are heredity and variability - darwinism applies.
This, this, exactly this. Darwin didn't derive the principles of natural selection from natural laws that wouldn't be discovered until the 20th century, he derived them by recognizing that changes which happened during human history (e.g. livestock breeding) could be attributed to basic qualities which populations of animals were known to have, whether domesticated or wild. The details will differ from paradigm to paradigm, but the only way to prevent evolution by natural selection is to prevent variability or heredity.

Maybe mimics could avoid evolving if their creation and reproduction are all managed by some handwavey magical force. Like, they're not animals, but creations of some Elder God of Deceit, and each new mimic that comes into existence is created by that god shedding a single tear onto the Material Plane. Or if mimics are made of some sort of unique matter, and rather than passing on genes, reproduction is just a mimic splitting into two identical masses of mimic matter.

But if a half-dragon mimic is possible, it's hard to argue that heredity and variability don't apply to them.