This concept can be discussed analogously between God and creation, even though the meanings are different, according to a view often traced to Aquinas. Ahmad Sirhindi emphasized the “unity of witness” over a unity of this concept put forward by Ibn Arabi. (10[1])A thing that has this concept necessarily rather than contingently is derived via (10[1])infinite regress in Avicenna’s (-5[1])Proof (10[1])of the Truthful. (10[1])An intellectual history by Arthur Lovejoy is titled for a schema of this concept that ranges from God to minerals. Duns Scotus conceived of a “univocity” of this concept, which (10[1])medieval philosophers placed on a “great chain.” Many (10[1])Islamic (10[1])thinkers commented on Aristotle’s treatise on “[this concept] qua [this concept],” (10[1])his Metaphysics. For 10 points, name this concept whose nature is studied in ontology. ■END■ (10[1]0[2])