How did spacetime pop out into existence?

[Orodruin]

I'm not talking about a point in spacetime. Also, the North Pole has nothing to do with this.

It does, it is a similar concept and you need to understand this in order to have any chance of understanding what is going on.

Please respond to the question, not my wording.

Have you stopped to consider that your wording is very relevant to what you are asking? That you are not able to put the question in a language that is appropriate is only indicative of the fact that you are not yet familiar enough with the mathematics which go into the description of how space-time behaves. As such, we can only give you something which is somewhat of a popularisation of the theory. The theory is self-consistent and described beautifully in mathematics, in order to understand it properly, you need to learn these branches of mathematics. It is not enough to read a popular account of things and "reason" based on what you have read.

 

[Isaac0427]

It does, it is a similar concept and you need to understand this in order to have any chance of understanding what is going on.Have you stopped to consider that your wording is very relevant to what you are asking? That you are not able to put the question in a language that is appropriate is only indicative of the fact that you are not yet familiar enough with the mathematics which go into the description of how space-time behaves. As such, we can only give you something which is somewhat of a popularisation of the theory. The theory is self-consistent and described beautifully in mathematics, in order to understand it properly, you need to learn these branches of mathematics. It is not enough to read a popular account of things and "reason" based on what you have read.

Ok, but can you please give me a simple answer: is there something that would have caused the Big Bang, or are we just assuming it appeared.

 

[Isaac0427]

Why do you find this harder to imagine than the Earth having a north pole?

Because the North Pole is the effect of the Earth's positioning. Spacetime having a beginning seems to be the effect of nothing at all.

 

[Orodruin]

Because the North Pole is the effect of the Earth's positioning. Spacetime having a beginning seems to be the effect of nothing at all.

It is the effect of a coordinate system having a point at which the coordinates do not tell you very much. It is different from the singularity of the FLRW space-time in that you can remove the singularity by imposing a different coordinate system, but similar in the sense that there is a point where the given coordinate system breaks down. Once you understand this, you can start thinking about a cone with the top point removed, this is to some extent more similar to the type of manifold you would deal with in the FLRW case.

is there something that would have caused the Big Bang, or are we just assuming it appeared.

You are back at arguing in a manner that you have been repeatedly told does not make sense. You cannot talk of appearing or cause without a time concept, which is an integral part of the space-time itself.

The OP has been answered several times over and you are going in circles here. Thread closed.