Just read the rest of the OP and, surprise to say, it isn't that complicated.
The point behind P2 is to eventually establish that a "first cause" must cause all else (and itself). Thus, avoiding infinite regress.
That first cause the OP calls "God" irrespective of what it is.
So he didn't actually rule out a naturalistic "first cause", only that he reckons that should be called "God" anyway.
The point behind P2 is to eventually establish that a "first cause" must cause all else (and itself). Thus, avoiding infinite regress.
That first cause the OP calls "God" irrespective of what it is.
So he didn't actually rule out a naturalistic "first cause", only that he reckons that should be called "God" anyway.