«القضية الطبيعية»
A natural proposition makes a judgment about a universal nature itself.
«الإنسان نوع»
Human is a species.
Here being a “species” is predicated of the universal concept and nature of human. It does not mean that Zayd or Amr as an individual is himself the logical universal “species.” Specieshood belongs to the nature considered universally.
Likewise, “Animal is a genus” predicates genushood of the universal animal concept, not of each individual animal as such.