Q. How can anyone actually believe that a mere man could be infallible?
A. Of course, an athiest would never accept this, but anyone who believes in a Creator God could easily accept that God can do anything He chooses to do. Wouldn’t you agree? So, anyone who believes in an all powerful God could accept that it would be theoretically possible for God to cause a man to be infallible.
But, that does not mean that He would choose to make a man infallible. So, then we could ask,
“Has He ever made any mere man infallible in the past?” And the answer to that question is
But here we are only left with Jews and Christians, perhaps Muslims, but I don’t know for sure, who believe that God has made many different men infallible down through the ages. Anyone and everyone who believes Sacred Scripture is the infallible word of God can agree that God did inspire all of the authors to write these books and teach the truth infallibly.
Of course, this does not prove that the pope is infallible but we can also see that God has no problem with leading His people infallibly through a mere and sinful man.