He argued against the the mysticism of his student (*) Iamblichus.
This philosopher's ideas were the basis for the opening sections of Peter of Spain's most famous work. He wrote the most famous ancient tract claiming that Christ was nothing but a great philosopher. He substituted "species" for "definition," in his version of the five predicables. This philosopher created a diagram that iterates a forking of species within a genus, while listing their differentiae. He argued against the the mysticism of his student (*) Iamblichus. This philosopher gave the earliest influential account of the problem of universals. His namesake "tree" appears in a book that, in a translation by Boethius, was read as a primer for the Categories, and thus as the basic logic textbook in medieval universities. For 10 points, name this compiler of the Enneads and author of the Isagoge, a Neoplatonic student of Plotinus.
This philosopher's ideas were the basis for the opening sections of Peter of Spain's most famous work.
Porphyry of Tyre [or Porphyrios; accept Porphyrian tree or Arbor Porphyriana] 