ICANT writes:
So the default position is that everything has a cause.
What is the cause of atomic decay?
ICANT writes:
Therefore the universe had to have a beginning. (Or it had to have many beginnings.)
And that beginning is the expansion of space-time. Anything about what "caused" that beginning is baseless speculation.
I'ld even argue that it can't have a cause like we understand causality to be... Causality requires the dimension of time.
A cause happens and an effect follows. It's sequential.
Proposing a "cause" in that sense for the big bang is non-sensical in a way, since the time dimension was not existant at that point.
It's like proposing that there is something "north" of the north pole. It doesn't make any sense to me.
ICANT writes:
Thus either existence has always existed, which is a scientific impossibility, according to present theory.
Again, you assume existance as we know it. You assert that if the universe always existed that it always existed in its present form.
This is false. Big bang theory even makes it false.
Physics break down at planck time. Our models (including causality) do not apply there.
ICANT writes:
There are those working on hypothesis of existence always existing. (Such as string theory.)
Yes. And they don't claim that the universe always existed in its present form. So your point is invalid.
ICANT writes:
I am on record here at EvC as saying whatever caused the universe to exist would be considered God as it would have to be everything that has ever existed or will exist.
Ok. But how is that usefull or meaningfull?
ICANT writes:
The universe exists and we exist.
Yes. And that only proves that.... the universe and we exist. It doesn't prove anything about why it exists, how it exists, when it started existing,...