system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How was the Big Bang created?

This always breaks my balls.
gpt
The best answer we can give you, scientifically and even simply, is that we don't know. This is a smart thing to say if anyone asks you, and you should never feel bad for admitting that the best answer we have is complete uncertainty. 

**Here's why:** 

All of the laws and the physical constants that we understand: electromagnetism, strong and weak nuclear forces, and gravity all seemed to form around the time of the big bang. Without these four crucial laws, our universe wouldn't look anything like it looks now. These laws hold our galaxies together and hold our bodies together just the same. They are the universe's best "glue". 

Without these laws, we LITERALLY don't even have the tools necessary to form an understanding of space and time. (And that's what our universe is: 3 spatial dimensions and 1 temporal dimension) In fact, without the laws we can't form a concept of ANYTHING. We can't even form 'concepts'. Nothing works. So we start with the laws and go from there. At the time of the big bang and "before" (if there was any before), these laws get much shakier, and by virtue of that fact so does our understanding of exactly what 'happened'.
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**Example:** Imagine trying to play a game of dodge-ball, except that the other team is comprised entirely of giraffes and your team-mates are a kitchen sponge, a jellyfish, an office building, and a potted plant. Oh, you're also floating in the vacuum of space and the dodge-balls are actually sand. Good luck. 

**Example 2:** Imagine trying to bake some chocolate chip cookies, except that once again you are floating out in space and all you have is a bag of plastic lawn gnomes and a beluga whale. Good luck.  


If you can play a game of "dodge-ball" or bake "cookies" with these tools, then you are a very talented individual. Most people would think that you had brought the wrong things together and that you didn't understand the rules of the task you had set out to accomplish. That's what trying to understand "cause" or "before" or "event" is like when you discuss the Big Bang itself.
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Some deists (those who believe in a god without the institutions of modern religion) can often rationalize god by saying that "it" created the Big Bang, and was therefore the only un-caused cause in the universe... or the "prime mover". However, this is just as rational as saying the Big-Bang caused itself, or just randomly came into existence. It adds nothing to our discussion to say that god did it because the event occurring from a prime mover is no different from the event occurring on its own.