… The reason I ask for scripture is indeed because protestants plug their ears when you present anything that is not in scripture. No matter how much common sense or logic you use, the response is, “ok, but where is that in scripture?” …
Ok, ask them why do they require Scriptural support for a Catholic doctrine? Ask them what is the Scriptural basis for this “doctrine” of the necessity of bible verses to support Catholic doctrine? Ask them for book, chapter & verse.
Also ask them where Jesus says that “ALL Christian doctrine & practice MUST be supported, explicitly or implicitly, from Scripture”? Or words to that effect.
The reason Jesus didn’t say that is because he taught the Apostles ORALLY the Word of God, which he commanded them to do in turn, i.e., to preach & teach the Gospel ORALLY (Mt 16:15-16). This Gospel, the oral Word of God, know as Apostolic Tradition, is the basic source of ALL Catholic doctrine.
This oral Word of God predated the first book of the NT by at least 10 years. And NO one knew what the complete canon of Scripture was until Pope St. Damasus approved the decision of the Council of Rome in 382AD. And remember, there were over 300 books in circulation in the 4th century which claimed to be inspired.
You could also ask them where the bible defines itself, i.e., ask them for the inspired list of canonical books. Of course there is none. Pope St. Damasus defined the canon when he approved the Council of Rome’s list of canonical books. Ask them why they waive the “Scripture alone” doctrine on this point. Which happens to be THE basic point on Scripture, namely, what books constitute Scripture.
The early Christian writers who claimed to have been taught by the Apostles all wrote about the seven sacraments, the necessity of baptism, receiving communion at Mass, belief in purgatory, praying to the saints, going to confession and obedience to the Pope. This is the evidence we have that what the Apostles taught as the Gospel, the oral Word of God, included praying to the saints in heaven. They taught it because Jesus himself communicated it to them.
What the Apostles taught was the Gospel which is today, and was 2,000 yrs ago, known as the Catholic faith. Some of the doctrine and practice of the Catholic Church is supported from Scripture, but not all (e.g., no inspired canonical index of Scripture exists). Nor is Scriptural evidence necessary. Who said it was? Not Jesus.
Scripture is not a catechism but a narrative of salvation history. Doctrinal beliefs and Scripture are distinct, yet closely related as they have the Holy Spirit for their source and end. This is why Martin Luther, the ex-Catholic priest who created the “Scripture alone” theology, had to write his catechisms as he too knew that Scripture does not explain itself nor force its interpretation on anyone.