Absurd. A unique human begins with the zygote, created by the joining of chromosomes from sperm and ovum. Any other definition of human is necessarily political, i.e., at what point do we accept the person to be human? Your definition, Zinj, is extremely broad and vague and would justify the killing of anyone that you believe to be inferior. That idea was tried back in the first half of the 20th century to great loss of life and fortune.