Well something has to exist.
We percieve things. This perception must have a cause. We define that cause as reality.
Now I'm under no illusions that there is more to reality than what we can percieve. And as we cannot percieve it, you cannot contemplate it, as we have no frame of reference.
We are starting to get brief glimpses at such "nonsense" when we observe the effects of relativity, and quantum mechanics, which very much go against what "makes sense". I believe that these phenomena are just the tip of the iceberg. Things even more incomprehensible would probably exist entirely outside of our "confined" reality of what we can percieve.
This is what makes questions such as "What came before the Big Bang" meaningless. NOTHING came before the big bang, as time didn't exist then. Such a concept as a time with nothing "before" it, makes no logical sense. But thats only because we are used to viewing time in an "everyday" manner.
Trying to imagine a "reality" external to our universe is impossible, as all of our undersatnding comes from our previous experiences.
So imagine that we were inside a "Matrix" of sorts. (Which as you can see from my above comments, I, in a way, believe). What of it? What difference does it make? We are still percieving A reality. We still percieve things, and we still try to explain that which we percieve. We define what is real in this way.
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