[metmom]

You showed one instance of a Protestant defining Sola Scriptura (not defending it, just defining it),

I just did. Scripture is the very God breathed word of God. It is authoritative because God is authoritative and it is truth because God is truth.

Jesus clearly thought the word was sufficient. When tempted by Satan in the wilderness, all He did was quote Scripture at him and that was the end of it.

and you have not showed one iota of proof that Catholics do not defend their own Doctrine.

I have one right now. You didn't answer my questions.

[rbmillerjr]

Sola scriptura is self-refuting.

It is not in the Bible.