Now, on to the solution to Fkjuliano’s issue which you seem to ask I “solve.”:
The Mormon god cannot have been born as an ordinary man on another planet if he had created the universe, for in that case he was no ordinary man. On the other hand, if he was god and creator from the outset, then that was simply the immutable reality of his existence and there was no “theosis” (the belief that humans can rise to godhood). Patently, without this precedent the very concept of “theosis” is invalidated, even within the context of Mormon theology.
First, As Dianaiad and I have both said, “born as an ordinary man on another planet” does not describe God the Father any more than it describes the birth of God the Son in the New Testament. So from the beginning Fkjuliano’s definition of LDS belief is wrong so any development to a logical problem is questioned by this error.
Second, one might infer that for a human to become what God is would require that a human be precisely what God once was, but this is not logically required. So that we can all agree, God the omnipotent can re-make us into whatever He chooses. Thus via the action of omnipotence, what was once not God can become god. My true beliefs on this are quite congruous with this assertion, but all that is important is to demonstrate that what one (or Fkjuliano in this case) might infer is not logically necessitated.
Finally, LDS cannot embrace the idea that God created ex nihilo (or from absolutely nothing). While I believe the person (or personage if you prefer) we call God the Father did create the universe, I believe this creation was an organizing of chaos. Before (logically before since I still have some thoughts on time that seem to differ from Ostler BTW) God the Father created the universe, there was not an absolute NOTHING. Instead what existed logically before God’s creation was an unorganized chaos that cannot be experienced, notices, weight, sifted, timed, measured, … by non-God. God organized the chaos into the universe, into us, into all that IS. (BTW, most Biblical scholars now acknowledge that this is the “creation” spoken of in the Bible. Many (most even) theologians still believe in Creation ex Nihilo, but even some of these theologians place the ex nihilo creation pre-Genisis).
So to recap, I suggest that when a LDS says that God the Father was once a man, many believe that this does not involve God the Father being a man more like sinful TOmNossor and less like perfect Jesus of Nazareth. Second, there is nothing logically contradictory in the idea that omnipotence can change a person into a god regardless of what God the Father was or was not an eternity ago. And finally, LDS do not mean creation ex nihilo when we say, “God created everything.”
If there is a logical contradiction in the above, I hope you will point me to it. If you find it weird, unpalatable, or … then I am fine with that.
Now, do you want to solve the Catholic logical problems (without denying dogma)?
Charity, TOm