Secondly, there are always going to be items on that list that supposedly identify persons as opposed to a human being but which will exclude human beings that are clearly persons. If self-consciousness is a qualification for personhood then little babies are not persons, and by that reasoning we can take an infant's life without killing a person. It doesn't work and that's the problem with lists of criteria which distinguishes person from human beings. They turn out to be arbitrary. The simplest way to approach it is that there is no difference between a human being and a person.
Human beings are persons by their very nature.
They are personal beings. Whether or not they are self-conscious is not the issue. That is the nature of being human. All human beings are persons. They toss it out in an attempt to end the discussion and win the argument for themselves.