It could be they have no answer. Or for some strange reason, the truth would threaten their beliefs. Truth nourishes, it does not threaten.
In order for Protestants to exercise the principles of sola Scriptura they first have to accept the antecedent premise of what books constitute Scripture - in particular, the New Testament books. This is not as simple as it may seem at first, accustomed as we are to accepting without question the New Testament as we have it today. Although indeed there was, roughly speaking, abroad consensus in the early Church as to what books were scriptural, there still existed enough divergence of opinion to reasonably cast doubt on the Protestant concepts of the Bible's self-authenticating nature, and the self-interpreting maxim of perspicuity.The following overview of the history of acceptance of biblical books (and also non-biblical ones as Scripture) will help the reader to avoid over-generalizing or over-simplifying the complicated historical process by which we obtained our present Bible.
It's important to understand the difference between enscripturation (the actual writing) of the inspired books, and canonization ( a universal rule). Canonizing does not make the books inspired, they already are. But inspiration had to be proven, not just assumed.
A Visual Diagram of the History of the New Testament Canon
Explanation of Symbols: *Book accepted (or quoted)
? Book personally disputed or mentioned as disputed
x Book rejected, unknown, or not cited
watch for these symbols or the diagram will be confusing * ? x. It may be boring for some, just scroll to the bottom. Sorry it's so long but it is no longer available on line.
ALL SOURCES FOR THE CHART ARE PROTESTANT
1) Douglas, J.D., ed.,
New Bible Dictionary,Grand Rapids, MI: Eerdmans, 1962 ed., 194-98.
2)Cross, F.L., and E.A. Livingstone, eds.,
The Oxford Dictionary of the Christian Church,Oxford: Oxford Univ. Press, 2nd ed., 1983,232,300,309-10,626,641,724,1049,1069;
3) Geisler, Norman L. & William E. Nix,
From God to Us: How We Got Our Bible,Chicago: Moody Press, 1974, 109-12,117-25.
New Testament Period
(c.35-90) In this period there is little formal sense of a Canon of Scripture
****************************************************************************
Apostolic Fathers (90- 160)
************************************
Summary: The New Testament is still not clearly distinguished qualitatively from other Christian writings-----------------------------------------------------------------------------------------------------
Gospels Generally accepted by 130
Justin Martyr's "Gospels" contain apocryphal material
Polycarp first uses all four Gospels now in Scripture
-----------------------------------------------------------------------------------------------------
Acts Scarcely known or quoted
-----------------------------------------------------------------------------------------------------
Pauline Corpus Generally accepted by 130, yet quotations are rarely introduced as scriptural
Philippians, 1 Timothy:x Justin Martyr
2 Timothy, Titus, Philemon: x Polycarp, Justin Martyr
-----------------------------------------------------------------------------------------------------
Hebrews Not considered canonical
? Clement of Rome
xPolycarp, Justin Martyr-----------------------------------------------------------------------------------------------------
James Not considered canonical; not even quoted
xPolycarp, Justin Martyr-----------------------------------------------------------------------------------------------------
1 Peter Not considered canonical-----------------------------------------------------------------------------------------------------
2 Peter Not considered canonical, nor cited-----------------------------------------------------------------------------------------------------
1, 2, 3 John Not considered canonical
x JustinMartyr
1 John ? Polycarp / 3 John x Polycarp-----------------------------------------------------------------------------------------------------
Jude Not considered canonical
x Polycarp, JustinMartyr-----------------------------------------------------------------------------------------------------
Revelation Not canonical
x Polycarp****************************************************************************
Irenaeus to Origen (160-250)
****************************************************************
Summary: Awareness of a Canon begins towards the end of the 2nd century Tertullian and Clement of Alexandria first use phrase New Testament------------------------------------------------------------------------------------------------------Gospels Accepted------------------------------------------------------------------------------------------------------
Acts Gradually accepted------------------------------------------------------------------------------------------------------
Pauline Corpus Accepted with some exceptions:
2Timothy: x Clement of Alexandria Philemon: xIrenaeus, Origen, Tertullian, Clement of Alexandria------------------------------------------------------------------------------------------------------
Hebrews Not canonical before the 4th century in the West.
? Origen
* First accepted by Clement of Alexandria------------------------------------------------------------------------------------------------------
James Not canonical
? First mentioned by Origen
xIrenaeus, Tertullian, Clement of Alexandria------------------------------------------------------------------------------------------------------
1 Peter Gradual acceptance
* First accepted by Irenaeus, Clement of Alexandria------------------------------------------------------------------------------------------------------
2 Peter Not canonical
? First mentioned by Origen
x Irenaeus, Tertullian, Clement of Alexandria------------------------------------------------------------------------------------------------------
1 John Gradual acceptance
* First accepted by Irenaeus
x Origen-----------------------------------------------------------------------------------------------------
2 John Not canonical
? Origen
x Tertullian,Clement of Alexandria-----------------------------------------------------------------------------------------------------
3 John Not canonical
? Origen
x Irenaeus,Tertullian, Clement of Alexandria-----------------------------------------------------------------------------------------------------
Jude Gradual acceptance
* Clement of Alexandria
xOrigen
-----------------------------------------------------------------------------------------------------
Revelation Gradual acceptance
* First accepted by Clement of Alexandria
x Barococcio Canon,.206
===================================================================Epistle of Barnabas * Clement of Alexandria, Origen-----------------------------------------------------------------------------------------------------
Shepherd of Hermas * Irenaeus, Tertullian, Origen, Clement of Alexandria-----------------------------------------------------------------------------------------------------
The Didache * Clement of Alexandria, Origen-----------------------------------------------------------------------------------------------------
The Apocalypse of Peter * Clement of Alexandria-----------------------------------------------------------------------------------------------------
The Acts of Paul * Origen
* Appears in Greek,Latin (5), Syriac, Armenian, & Arabic translations
-----------------------------------------------------------------------------------------------------
Gospel of Hebrews * Clement of Alexandria
***********
Muratorian Canon (c.190)
Excludes Hebrews,James, 1 Peter, 2 Peter Includes The Apocalypse of Peter, Wisdom of Solomon
*************************************************************************
Summary : The Catholic epistles and Revelation are still being disputed----------------------------------------------------------------------------------------------------
Gospels, Acts, Pauline Corpus Accepted--------------------------------------------------------------------
Hebrews * Accepted in the East
x, ? Still disputed in the West-----------------------------------------------------------------------------------------------------
James x, ? Still disputed in the East
x Not accepted in the West-----------------------------------------------------------------------------------------------------
1 Peter Fairly well accepted-----------------------------------------------------------------------------------------------------
2 Peter Still disputed-----------------------------------------------------------------------------------------------------
1 John Fairly well accepted-----------------------------------------------------------------------------------------------------
2, 3 John, Jude Still disputed-----------------------------------------------------------------------------------------------------
Revelation Disputed, especially in the East
xDionysius**************************************************
Council of Nicaea (325)
Questions canonicity of James, 2 Peter, 2 John, 3 John, and Jude ****************************************************************************
From 325 to the Council of Carthage 397
**********************************************************
Summary: Athanasius first lists our present 27 New Testament books as such in 367. Disputes still persist concerning several books, almost right up until 397, when the Canon is authoritatively closed
----------------------------------------------------------------------------------------------------
Gospels, Acts, Pauline Corpus, 1 Peter, 1 John Accepted-----------------------------------------------------------------------------------------------------
Hebrews Eventually accepted in the West-----------------------------------------------------------------------------------------------------
James Slow acceptance
Not even quoted in the West until around 350!-----------------------------------------------------------------------------------------------------
2 Peter Eventually accepted-----------------------------------------------------------------------------------------------------
2, 3 John, Jude Eventually accepted-----------------------------------------------------------------------------------------------------
Revelation Eventually accepted
x Cyril of Jerusalem, John Chrysostom, Gregory Nazianz
===================================================================Epistle of Barnabas * Codex Sinaiticus - late 4th century-----------------------------------------------------------------------------------------------------
Shepherd of Hermas * Codex Sinaiticus - late 4th century
Used as a textbook for catechumens according to Athanasius-----------------------------------------------------------------------------------------------------
1 Clement, 2 Clement * Codex Alexandrinus - early 5th century (!)
Protestants do, of course, accept the traditional Canon of the New Testament (albeit somewhat inconsistently and with partial reluctance- Luther questioned the full canonicity of James, Revelation and other books). By doing so, they necessarily acknowledged the authority of the Catholic Church. (which is why Matt gets no answers)
If they had not, it is likely that Protestantism would have gone the way of all the old heresies of the first millennium of the Church Age - degenerating into insignificant, bizarre cults and disappearing into the putrid backwaters of history.