If it is true that...

The nature of the species is indeterminate with respect to the individual just as the nature of the genus is with respect to the species

and

The genus, as predicated of the species, includes in its signification everything that is in the species determinately

Then it must be true that...

The essence of a composite thing is not the composite thing itself, even if the essence is composite

If it is true that...

The essence of a composite thing is not the composite thing itself, even if the essence is composite

and

The designation of species with respect to the genus is through form, and the designation of the individual with respect to the species is through matter

Then it must be true that...

Humanity signifies the essence of man as a part, excluding all designation