Arguments for God's Existence from Contingency

[Neo-Scholastic]

1. Yes nonexistence is impossible.
2. No, it has not been proven that the first cause was a supernatural prime mover with a mind called "God."

Because it takes further demonstrations to make that clear. A single demonstration does not a full philosophy make. All the argument shows is that there is something that matches a role or attribute traditionally ascribed to God.

3. All the talk about potentiality is nonsense because actuality is the only thing that is actual and therefore existent.

If you think that then I suggest you go back and look at how Aristotle resolved the dilemma between Parmenides and Heraclitus. We stand on the shoulders of giants and ignore their contributions at out peril.