The Bible does not teach that it is the sole authority

I apologize in advance for what will undoubtably be a very poor round; my computer's been acting up and I've not been able to present as good an argument as I would like to.Rebuttals:First Point2 Timothy 3:16-17'All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the servant of God may be thoroughly equipped for every good work.'I personally don't see much of an argument here, just a quote of scripture. Surely it is true. What relevance it has to my opponent's case is yet to be determined, as it sure doesn't say 'The Bible is the sole authority', or even 'the Sacred Scriptures are the sole authority'.1 Corinthians 4:6'Now, brothers and sisters, I have applied these things to myself and Apollos for your benefit, so that you may learn from us the meaning of the saying, "Do not go beyond what is written." Then you will not be puffed up in being a follower of one of us over against the other.'I request that my opponent exegete this passage. I'll provide my own exegesis of it for now.It pretty clearly states 'so that you may learn from us the meaning of the saying "Do not go beyond what is written."'So what is the meaning of this saying? I'm not quite sure, but it definitely says 'then you will not be puffed up in being a follower of one of us over the other', referring to a dispute between the Corinthians over who was the greatest out of Apollo, Cephas, and Paul himself. Clearly, Paul was not in any way referring to authorities, but admonishing the Corinthians for their pride in trying to unrighteously judge who was the greatest among those three.Proverbs 30:5-6'Every word of God is flawless; he is a shield to those who take refuge in him. Do not add to his words, or he will rebuke you and prove you a liar.'This says that every word of God is flawless, which I would suppose includes words outside of the Bible.'We also constantly give thanks to God for this, that when you received the word of God that you heard from us, you accepted it not as a human word but as what it really is, God’s word, which is also at work in you believers.' - 1 Thessalonians 2:13That you heard from us, not that you read from us, that we read to you, or anything suggesting any form of writing.I surely agree with my opponent that the Scriptures are useful for teaching, rebuking, correcting and training in righteousness, but this doesn't prove them the only authority.Second PointWhile my opponent supposes that the 'word of God' in every provided verse is the Bible itself, that claim is not tremendously supported by the actual verses.In pretty much every verse (to the best of my knowledge), the word of God is preached, heard, spoken, or some verb implying transmission verbally and orally, rather than by text.2 Peter 3:16'speaking of this as he does in all his letters. There are some things in them hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other scriptures.'The Bible and the epistles that comprise it are the scriptures, and as far as I can tell the Bible only refers to itself as the scriptures, not as the word of God. For that reason, I find it unlikely that the preached, heard, spoken, or orally transmitted word of God referred to is the Bible.Third PointThis point is pretty much just some unsubstantiated hypothesizing. I could just as easily claim the opposite.ConclusionThe Bible does not teach it is the sole authority, as it acknowledges other authoritative sources.Thank you.