My argument stated, that in the context of the MGB, a being is greater than another if it can convince more people of its existence. If a being can convince X + 1 people of its existence, then it is greater, by definition. A maximally great being would thus have to be maximally great in this regard, meaning that it is not possible to be any greater than it, by definition. The only way for it to be impossible for another being to convince X + 1 people of its existence is if X already contains the entire set of the population since it is impossible to have an attribute (such as being convinced) apply to more items than there are items entire set.
Then X+1 would be irrelevant. The criteria for being a maximally great being would be to convince X, which contains everyone. But that was NOT your premise. You sought to relate the greatness of beings by stipulating their capacity to convince a number of people with respect to the other. So let's use this as an example: Being 1, Being 2, and Being 3 are part of a universe which contains seven billion people. Being 1 convinces five billion people; Being 2 convinces 1.9 billion people; Being 3 convinces 100 million people. It is impossible for 1.9 billion to be "greater" than five billion; it is impossible for 100 million to be "greater" than five billion. Being 1 according to your premise is the maximally great being. Now, let's use your numbers: Being 1 convinces seven billion people; Being 2 convinces no one; Being 3 convinces no one. Being 1 is still the maximally great being because it is impossible for 0 to be greater than seven billion.
You're backpedaling in an attempt to retroactively revise the parameters of your first premise, so that your second premise won't be invalidated. But your first premise will always invalidate your second premise, because your second premise restricts to absolutes while your first premise is fundamentally comparative. This is just as much an issue of grammar as it is logic.
No. Since the MGB is the "Maximally Great Being", it would have to convince the maximum number of beings of its existence. Unless you can show how it is impossible for the maximum number of beings to mean every being, then it would have to mean every being, since if it doesn't, then there would be more beings that could be convinced.
Non sequitur. And your reasoning makes no sense. Using the numbers in my earlier examples, if there are seven billion people and Being 1 convinces five billion people, Being 2 convinces 1.9 billion people, Being 3 convinces 100 million people, how would it be possible to convince more people than Being 1?
See points 1 and 2 of this post.
Once again, you've not demonstrated anything.
Why does the conceiving of a world where X doesn't exist mean that the beings in that world acknowledge its non-existence?
They can't know it doesn't exist because it doesn't exist. The nonexistent doesn't provide any information on itself. It's imperceptible. But, I'll continue this below.
P5 is faulty. The act of conception happens in the current time (and thus would be in respect to time Y), but the subject that is being conceived isn't in current time. The conception of Z occurs in time Y, but since it has it's own setting, the subject matter itself wouldn't be in respect to time Y. The timeline of the world at time Z would also follow the timeline of Z, not of Y.
No it's not. Because in time Y, you know that cellphones exist. Therefore, any conception even in retrospect will contain this knowledge. Even if the subject is time Z, your conception will be a fabrication of it informed through the accumulation of knowledge in years current and previous. In other words, you'll never be able to conceive anything that isn't affected by that which you know now. Knowledge isn't piecewise, so to speak.