Catholicism vs Biblical Christianity: "Sola Scriptura" is right

I use the glorious master race 1899 American Edition of the Douay-Rheims translation, which is glorious and master race (he said redundently).1)Firstly, the Catholic Church did not 'make up' the Assumption of Mary [1]. Secondly, my opponent presupposes the Bible as the only source of authority for this to even be a problem, yet he has egregiously failed to prove that. Thirdly, my opponent has not treated with my arguments.2)While my opponent claims 'It is the people who divided themselves', the exact reason they divided themselves is because of sola scriptura. Sola scriptura lends itself to scriptural anarchy, allowing any old person to take their prejudices, preconceptions, and pre-formed conclusions, read the scriptures, then twist the scriptures to prove what they already had decided upon going in. Very importantly, sola scriptura lets anyone become the final judge of what a scripture means. By it's very nature, that makes it impossible to ever reach decisive conclusions, because one moron can always stand up and declare the scripture is saying something different, even if it very clearly is not.That new argument my opponent threw out, in addition to being quite unsupported, proves nothing. In fact, as he himself wrote, 'some does not follow Catholicism, but claims to be Catholic.'. It is certainly impossible to be Catholic while refusing to adhere to Catholicism. While Protestant A can deem Protestant B a heretic and Protestant B can decide the same about Protestant A, Catholics C and D can never do the same, because to be a Catholic one must adhere to Catholicism, and an adherent of Catholicism can never be a heretic to another Catholic.3)I can state with confidence that my opponent spends a lot of time talking to Catholics who have no idea what they're talking about at best, and are not Catholics at worst, which is rather unfortunate. While this contention has nothing to do with sola scriptura, I will deal with it anyway.Very truly I tell you, the grace of God is dispensed by means of the Sacraments, which are themselves provided by the holy Church. Read the following verses:Baptism:'He that believeth and is baptized, shall be saved: but he that believeth not shall be condemned.' - Mark 16:16Confession/Reconciliation/Penance:'No, I say to you: but unless you shall do penance, you shall all likewise perish.' - Luke 13:13'Whose sins you shall forgive, they are forgiven them; and whose sins you shall retain, they are retained.' - John 20:23Communion:'He that eateth my flesh, and drinketh my blood, hath everlasting life: and I will raise him up in the last day.' - John 6:55Confirmation:'Then they laid their hands upon them, and they received the Holy Ghost.' - Acts 8:17Holy Orders:'Neglect not the grace that is in thee, which was given thee by prophesy, with imposition of the hands of the priesthood.' - 1 Timothy 4:14Extreme Unction/Anointing of the Sick:'(14) Is any man sick among you? Let him bring in the priests of the church, and let them pray over him, anointing him with oil in the name of the Lord. (15) And the prayer of faith shall save the sick man: and the Lord shall raise him up: and if he be in sins, they shall be forgiven him.' - James 5:14-15You can see from all these verses that the Sacraments have actual and real effects unto salvation, and the Sacraments are to be administered by the successors of the Apostles, the Bishops. Since the Church provides these, it follows that one cannot be saved without the Church.In conclusion, sola scriptura was never proved.Sources:1. http://en.wikipedia.org...;