Right from the get-go, you choice of a polemic is a poor one, for as usual, it begins with a straw man that does not even consider the basic teaching of Westminster, which states,
...we acknowledge the inward illumination of the Spirit of God to be necessary for the saving understanding of such things as are revealed in the Word: and that there are some circumstances concerning the worship of God, and government of the Church, common to human actions and societies, which are to be ordered by the light of nature, and Christian prudence, according to the general rules of the Word, which are always to be observed.
All things in Scripture are not alike plain in themselves, nor alike clear unto all: yet those things which are necessary to be known, believed, and observed for salvation are so clearly propounded, and opened in some place of Scripture or other, that not only the learned, but the unlearned, in a due use of the ordinary means, may attain unto a sufficient understanding of them. - cps 6,7; http://www.spurgeon.org/~phil/creeds/wcf.htm While salvific Truth is plain enough so that one could read Acts 10:36-43 and be born again, which relates to formal sufficiency, Scripture also provides for reason, the church, etc. which relates to the material sufficiency of Scripture, and "the light of nature, and Christian prudence," and "due use of ordinary means." The fact is that, left to the straw man of your pasted polemic, evangelicals could not even believe in the Trinity, which they have contended for against cults for hundreds of years!
So it will just have to suffice to say that Sola Scriptura is both un-Biblical and illogical. The doctrine can nowhere be found in the Bible,
Of course not, since his definition of it is a contrived straw man that does not allow for beliefs held as Truths unless explicitly stated, but a confluence of text support, and ignores material sufficiency.
And by which we see that it is abundantly evidenced in Scripture that it is held as the assured Word of God and transcendent standard for obedience and testing and establishing truth claims.
And which reveals, sanctions and thus provides for writings being recognized as being so, and thus by extension for a canon, without an assuredly infallible magisterium which Rome, which Rome presumes she is and is necessary for assurance of Truth.
And from the beginning Scripture was formally sufficient to provide salvific truth, and materially provided for more, and increasing its degree of both as God gave more grace. Thus SS can be seen in Scripture in that sense, but that it contains all that can be known is not claimed, nor does the sufficiency of Scripture mean that.
Furthermore, plenty of Biblical texts can be referenced that call upon Christians to believe in oral Tradition as well as written Scripture But which were known truths recently taught, which could be written, as was the norm for that which is called the "word of God/the Lord, not nebulous oral tradion, that of ancient tales such as the Assumption Of Mary that even lacks early evidence in tradition.
And SS preachers also enjoin obedience to the oral word, that of Scriptural preaching, while the NT was not yet complete in Paul's time.
Finally, it is the Bible itself that calls the Church, not the Scriptures, the “pillar and foundation of truth” (1st Timothy 3:15). This should be enough for any level-headed Protestant,
That is absurd, absolutely ludicrous, and a testimony to the deceived heart that turns away from the Truth unto fables. What should be evident by God's grace to any level-headed believer is that all 1st Timothy 3:15 teaches is that the church supports the Truth, stulos and hedraiōma both having that meaning. And to extrapolate this means the church, not Scripture upon which it began, is the supreme authority is arrogant egregious wresting of texts.
Within 88 years, by January 1st, 2100, there will be nothing left of the Protestantism we know today. It will essentially be extinct.
The man is also a wannebe prophet, as while the Lord may return, it will not be Rome's errors that is in glory, but essential evangelical faith that exalts the Lord, not Mary.
Got to go now, but your attempts to support Rome have only once gain ended up exposing her fallacious support.
The Church did not begin upon Scripture, having been built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief cornerstone, in whom the whole building, being fitted together, grows into a holy temple in the Lord, in whom you also are being built together for a dwelling place of God in the Spirit.
It was founded upon people.