Salamanders share the common ancestor of reptiles and that is what they will remain. Salamanders aren't just the same creature in a different size or color. Different species of salamanders differ in structure and organs. There is more variation amongst salamanders than amongst great apes (chimpanzees, humans, gorillas, etc). Chimpanzees and humans are in the same family. But there are 10 families of salamander, in fact there are 3 sub-orders. If you accept a new family of salamander can evolve, then there is no room to deny humans could evolve from a chimpanzee ancestor, as that would be evolution below the family level.
LOL!
No, a salamander is still a salamander isn't it?
That is what you are still calling it, is it not?
And a chimp will always be a chimp and a human always a human.
Juggling definitions does not change the reality of that fact.
No a chimp will always be a primate, and a human will always be a primate.
Both just primates? OMG that must mean they can evolve into one another using your logic.