The real question is

why is there something rather than nothing?

no, the real question for all those rationalists is answer what do they mean by why

why 'why'
why does there have to be a purpose or meaning assigned to something? can it not just be as is. there is no answer to this.

For what reason, or what explanation, is there something rather than nothing?

[spoiler]God._____________________________[/spoiler]

...

Have you considered that "nothingness" doesn't exist anywhere and never has? There's always something somewhere. Existence is the default state of being.

Because in the infinite subset of infinite universes where existence=0 theres nobody around to ask that question. Anthropic principle my nigger.

Why would there be nothing?

Because the unmoved mover is randomness.