Basically nothing is true, everything is permitted. Its really all about people arguing about what is acceptable to do and believe and more importantly, what is acceptable for others to believe and do.

Ok, language defines our ability to understand reality. But our language is also defined entirely by our reality. We don't even have a language other than maths that can reasonably explain higher and lower dimensions, quantum mechanics. In fact our languages posit everything in relation to space (locations) and time (past, future, present).

Take those out of the equation and explaining existence without the concepts of time and space, gets rather difficult to comprehend. However, we do have evidence, that everything that makes up our existence, including us, existed prior to 'big bang' and exists across all dimesions - it simply changes form.

So "prior" to big bang (which may only may be occuring in terms of a position within the fourth dimension), everything that makes up all of our universe, existed in a different state, that is one in which time and space are not relevant concepts.

The process of big bang is a transition in which subatomic particles react in space-time, from the point at which space time (4D) starts (the end point say the third dimension) and the point at which the 5D starts. And it only appears as occurring to us, because we are a part of that transition from point to superpositional point (which from a 5D point has already occurred).

We are part of space and time in a very fundamental way, not separate from it (but the physical components that construct us are made from subatomic particles that always will exist.

Nothing sprang into existence with the big bang, it simply added a new dimensional point (possibly - as adding, springing and existence assumes an action in time and space).

There is no nothing. Even the voids of space have a physical reality.

Doesn't matter though does it really?

We are a bit like ants in the garden wondering how the paving stone that we nest under came to be.