Is the answer to why there exists something rather than nothing ultimately 'it just does'?

Update: Zaphod, It doesn't sound like there's any reason behind that though. Why 'must' it always exist? Why can it not not-exist? Just cuz?
Update 2: Why should anything exist necessarily? Space and time began to exist. The laws of physics fail at the big bang. That seems to defy logic as what was before and how can anything exist without being in space and time? A lot of things seem to not make sense and I'm wondering if the answers to the ultimate... show more Why should anything exist necessarily? Space and time began to exist. The laws of physics fail at the big bang. That seems to defy logic as what was before and how can anything exist without being in space and time? A lot of things seem to not make sense and I'm wondering if the answers to the ultimate questions might not make sense too?
Update 3: Maybe it can't not-exist because it would be illogical. Something must exist and be eternal because there couldn't just be nothing. Maybe it would even be impossible for there to just be nothing. But if the universe (or God) exists necessarily, then why is it necessary? Who or what decides that it's... show more Maybe it can't not-exist because it would be illogical. Something must exist and be eternal because there couldn't just be nothing. Maybe it would even be impossible for there to just be nothing. But if the universe (or God) exists necessarily, then why is it necessary? Who or what decides that it's necessary? Could it be that it just is?
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