To save the argument then, we need a rigorous definition of "beginning to exist", we need to show that it is in fact true that everything that meets this definition has a cause - taking care to deal with the extreme cases - and we need to accept this definition when building on the argument.
Even if our premise was right, everything exists only because it has been observed to exist which collapsed the Wave Function that started the whole process of Cause and Effect.
This scientifically based idea futhermore requires that an initial observer, one outside of the Universe, was required to have observe the first split seconds of the Big Bang which collapsed the Wave Function of the Quantum particles that transmuted into matter.
1) The key concept of the theory, which forms a central part of the Copenhagen Interpretation, is known as the "collapse of the wave function".
2) The theory seeks to explain how an entity such as a photon, atom, or an electron, could "travel as a wave but arrive as a particle."
3) According to the interpretation, what is passing through the split experiment is not a material wave at all, but is a 'probability wave'. ....That wave merely contains the "probability" for what COULD be real.
4) Once the thing is observed, the wave function collapses and the photon, atom, and electron, or the whole world becomes a reality
5) Nothing is real until it has been observed!
6) We really are saying that in the 'real' world - even outside of the laboratory - until a thing has been observed it doesn't exist. ....But, by observing, all things materialize
7)
This implies that there MUST actually be something 'outside' the universe, (God?), to look at the universe as a whole and collapse its overall wave function.....
Then, the Universe materialized and continues to so do.
http://www.thekeyboard.org.uk/Quantum%20mechanics.htm.
Copenhagen interpretation - Wikipedia