My point is that "kinds" *as the term is used by creationists* have no existence.
The word translated as "kinds" in the Bible may well simply mean that the offspring resemble their parents. But that in no way contradicts evolution. But that isn't what creationists mean. Evolutionary theory says that a dog won't give birth to a cat so that isn't what creationists mean either.
Creationists claim that there are basic discontinuities between different life forms such that they cannot be related. Thus if a creationist says that cats and dogs are different "kinds" he means that they do NOT share a common ancestor. Unfortunately for creationists the evidence is that they do. And typically a creationist will either suddenly decide that cats and dogs are the same kind after all or refuse to accept the relationship.