RATIONALEIt is in the area of rationale that Ibn Sina makes his most significant contribution. Ibn Sina introduces into the tradition a new argument for the necessity of a first cause: what I shall call the "aggregative argument". This argument is developed in ibn Sina's book, al-Najat. Let's assume that every contingent being has a cause. Consider the aggregate of all contingent beings -- that huge entity that contains all of the contingent beings of the world as parts, and that contains nothing else. Let's call this aggregate entity C. Is C itself a contingent being? Yes, it clearly is. Remember that C is the aggregate of all the actually existing contingent things. If any part of C ceases to exist, C itself ceases to exist. Here's an analogy -- let Y be the aggregate of all the members of the current roster of the NY Yankees. If a member of Y drops off the Yankees, Y will still exist, but Y will no longer constitute the aggregate of current Yankees. If one of the current members of the Yankees dies, then Y ceases to exist, even though the NY Yankees (as an organization) continues to exist.
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