It is Logically Impossible that a Maximally Great Being Exists.

So, this is an argument that I’ve been playing around with a bit. It centers around the notion that a maximally great being cannot exist because a greater being is always conceivable, rendering the proposition of such a being existing illogical. The argument is as follows: P1. If a maximally great being exists, it is greater than any other conceivable being. P2. There must exist a finite number of stars in the galaxy at any given time. P3. If there must exist a finite number of stars in the galaxy at any given time, then there must be a finite number of stars that a maximally great being could create. P4. If there must be a finite number of stars that a maximally great being could create, then there is always another number greater than this number. P5. If there is always another number greater than this number, I could then always conceive of a being that could create a greater number of stars than the maximally great being. P6. If I could conceive of a being that could create a greater number of stars than the maximally great being, then I am conceiving of a being greater than the maximally great being. P7. If I can always conceive of a being greater than a maximally great being, then a maximally great does not exist. C. Therefore, a maximally great being does not exist. The argument is logically valid as the conclusion follows from the premises. I find the premises to be fairly obviously true: P1. If a maximally great being exists, it is greater than any other conceivable being. This premise has already been agreed to by my opponent through his acceptance of my definitions. P2. There must exist a finite number of stars in the galaxy at any given time. The idea of an infinite number of stars existing in the galaxy at any given time is an incoherent one. P3. If there must exist a finite number of stars in the galaxy at any given time, then there must be a finite number of stars that a maximally great being could create. Clearly, if there must be a finite number of stars at any given time, then a MGB could not create an infinite number of stars, given that we have agreed that this MGB must by subject to the rules of logic. P4. If there must be a finite number of stars that a maximally great being could create, then there is always another number greater than this number. No matter what that finite number is that a MGB could create, there is always another number that is greater. For example, if an MGB could create 100,000,000,000 stars, 100,000,000,001 is a greater number. P5. If there is always another number greater than this number, I could then always conceive of a being that could create a greater number of stars than the maximally great being. It follows then, that a being that could create 100,000,000,001 stars is conceivable. P6. If I could conceive of a being that could create a greater number of stars than the maximally great being, then I am conceiving of a being greater than the maximally great being. And since this being can create one more star, this being is greater than the MGB. P7. If I can always conceive of a being greater than a maximally great being, then a maximally great does not exist. As a MGB is a being that is greater than all other conceivable beings and I can conceive of a greater being, a MGB does not exist. C. Therefore, a maximally great being does not exist. Since the conclusion follows from the premises, if the premises are true, the conclusion is true as well. That’s all for now, folks. I turn it over to Con and look forward to his response.