>>12439291All physical answers only lead to tautology in the end and the beginning of their answer, so, as such, it's important to think outside of the box.
Metaphysics will be answered, mostly, if it exists within the subset of the physical universe. It is causally mechanistic as well, and deserves rational explanation and experimentation.
You'll be surprised to think that God is outside of reason but you're wrong. There are ways of detecting the presence of a "created" or "designed" universe inherently within the construct of the universe itself.
Answering "the first mover" question for example would be your most direct route through physical experimentation to derive the evidence. This is invariably, hard, but I am sure with evidence generated through gravitational wave detectors and other useful technologies we can extrapolate the most reasonable answers.
We can apply different types of models to determine reasonable outcomes even without known information, leading to invariable conclusions.