Where do you suppose the early church fathers GOT the truths they used to develop the replies and arguments that established doctrines Christians should believe in the first place? I sounds to me like you are advocating for an authoritarian church that can determine for itself what is or is not the rule of faith based upon their own ideas, musings and interpretations and impose them upon ALL Christians whether or not they have Scriptural substantiation. Even a quick read through the writings of these early leaders will be enough to demonstrate that they relied upon both the Holy Scripture (God-breathed truth) and the Holy Spirit to defend truth from error.
Where are you getting this polemical idea of us deciding whatever we choose to call the basis of our faith? The obvious foundational fault some Roman Catholics rely upon is the mistaken idea that their church can dictate TO God what should be believed - even to the point of ignoring what He says in His word. This thread was started to discuss the relevant point of the role sacred Scripture plays within the church. To advocate that the church is master over God's word rather than its servant is to assert human authority above God's authority - QUITE a weak and shaky foundation! Why not do some reflecting of your own?
Not from scripture alone. You really don't think that do you? The apostles taught no one who taught no one who taught no one?
Sola scriptura is not possible, it's not scriptural and it's not historical.