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 (10[1])emphasized (10[1])the “unity of witness” over a unity of this concept put forward by Ibn Arabi. (10[4])A thing that has this concept (10[1])necessarily rather than (10[1])contingently is (10[1])derived (10[1])via (10[2])infinite regress (10[3])in Avicenna’s (10[3]-5[1])Proof (10[1])of the Truthful. (10[3]-5[1])An intellectual history by Arthur Lovejoy is titled for a schema (10[3])of this concept that ranges from God to minerals. (10[2])Duns Scotus conceived of a (10[2])“univocity” (10[1]-5[1])of this concept, (10[3])which (10[2])medieval philosophers placed on a “great chain.” (10[6])Many (10[2])Islamic (10[3])thinkers commented on Aristotle’s treatise (10[1])on “[this concept] qua [this concept],” (10[1])his Metaphysics. For 10 points, name this concept whose nature is studied in ontology. ■END■ (10[6]0[15])