So in the purest sense of the definition, I believe it is fair to say that for naturalistic evolutionists, humans do not have a soul
The theory of evolution does not say that, an atheist may
use evolution as a way of showing a lack of soul but this is not proof. When explaining how to fry an egg I am not getting into a discussion about if a chicken has a soul. When talking about chicken souls I may bring up the act of fying an egg however.
restricts humanity to bone, tissue, and chemical processes
Good, thats what a scientist should do when talking about bones, tissues and chemical processes.