tgislayer wrote:

If you think of us (the earth) in terms of how infinitesimally large the universe is and how infinitesemally small we are in comparison, Do we really exist?

Im a mathematician you see and if you can consider how much area the earth takes and compare it to the infinite area of space, we are technically nothing. Do you agree?

Are you really a mathematician...because if you were (I have a Bachelor's in Math, so you might consider me a novice mathematician) you'd know about the essentially universally accepted axiom of choice and how it invalidates your reasoning. You know, that axiom which basically states for any non-empty set (infinite in size or not) there exists an infinite (only if the original set has an infinite cardinality ofc) or a finite subset.

In other words, if we have a group of items, no matter how many, infinite or finite, we can take a subset (a selection of them, which can be the same as the original group of items btw) of those items, infinite (only if the original group of items had an infinite number of items in it ofc) or finite. This subset exists. Thus, if you take the universe as a whole to be a set, there exists a subset of that universe which is solely composed of yourself. Thus your point is completely null and void as you reasoned it out.

On the other hand, to make your case you could present the idea of a holographic universe or the idea that the universe is actually a simulation, but that's another story altogether.