If one is familiar with Catholic apologetics, particularly apologetics against Protestantism, one often encounters an argument that goes something like this:
It is obvious that Sola Scriptura doesn't work. I mean, look at all those Protestant denominations out there! There are tons of them! If Sola Scriptura worked, there wouldn't be so much division. Obviously, the idea of everyone interpreting the Bible for himself is a failure. We clearly need the infallible guidance of the Catholic Church to get the Bible right.
I have a problem with this argument, and the problem is one
I have addressed elsewhere in a more general way. I call this argument the Good and Intelligent People Disagree Argument (or GIPD, for short). There are two basic problems with it (I deal with these problems even more thoroughly in the linked article): 1. It just isn't the case that disagreement on an issue must indicate a lack of sufficiently available evidence or a lack of sufficient means to know something. 2. If this argument is a good one, it is just as much a problem for Catholics as it is for Protestants.
1. It isn't the case that disagreement is always indicative of lack of evidence. In the case of interpreting the Bible, it could be that there is enough objective evidence available to interpret the Bible rightly in a Sola Scriptura sort of way, but the evidence is just hard enough to get at that people who don't put in the necessary effort or care are prone to getting it wrong. And people can get confused sometimes, even when they are trying hard. Just because people get confused, it doesn't necessarily prove that something cannot be understood--even if lots of people get confused. People get confused about all sorts of things. I've personally encountered many people who get confused about self-evident or logically certain things like whether one can prove conclusively that 2+2=4, or whether logic applies to all reality, or whether things that come into being must have causes, or whether something must either "exist" or "not exist" and there is no third possibility, etc., etc. When something is not right in front of us in an empirical sort of way, when it is more abstract and requires more careful and disciplined attention, we are more likely to find confusion. This doesn't prove we can't know the truth in that matter.
And the argument fails to consider biases people have. Perhaps there are lots of different biblical interpretations not because it is impossible to understand the Bible aright but because people tend to approach the Bible with pre-conceived ideas as to what it must mean, what it can't mean, etc. People are often very personally (and not always rationally) motivated to hold certain positions and avoid others in religious matters. Sometimes coming to a certain conclusion would mean social upheaval for a person. Sometimes it would be very uncomfortable. Sometimes it would require certain lifestyle choices that are seen as absurd and/or undesirable. Sometimes people are biased by cultural or family upbringing. Etc., etc.
So it just isn't the case that even widespread confusion proves a lack of available evidence or proves that something cannot be understood in a certain way.
2. If GIPD is a good argument against Sola Scriptura, Catholics are in a lot of trouble too! Listen to this argument:
It's obvious that no one can really know that Catholicism is the true religion. I mean, look at all the religious disagreement out there! If we could know what the true religion is, there wouldn't be so much disagreement! This proves that we all ought really to be Agnostic until we really know something more definitely.
I submit that if the earlier argument against Sola Scriptura is a good one, so is this one against Catholicism and for Agnosticism. It's the same argument--"There is disagreement. Disagreement shows that something can't be known. So we can't know what there is disagreement about." In the earlier anti-Protestant argument, the idea is that no one can really know (using Sola Scriptura, without the Church's infallible guidance) what the Bible teaches, and we can tell this because people using Sola Scriptura can't agree. In the latter argument, the idea is that we really can't know which religion (if any) is true, and we can tell this because all the people of the world examining the available evidence in such matters have been unable to agree. So the available evidence must not be sufficient to determine the matter, so we should be Agnostic. But I don't think this is a good argument for Agnosticism, and for the same reasons I don't think this is a good argument against Sola Scriptura.
Now, let me add that I do in fact think that there are serious problems with Sola Scriptura. More particularly, I do think that the Bible alone, without further infallible guidance, provides insufficient means for deciding between controverted denominational teachings. I think this because, upon examination, it seems to me that there is simply not enough evidence in the Bible to decide all sorts of things that Christians need to know. For example, the Bible simply doesn't give us enough information, I think, to decide what to do about infants and baptism (unless we add in extra-biblical assumptions--but if we do that, we have to justify them on grounds outside of the Bible, and I don't think we can do this with the assumptions we need). We can guess at what, say, Paul would have said if we could have asked him about it. But we really don't have enough information to know with any significant degree of confidence what he would say based on what he has actually said. (Baptists and Paedobaptists, of course, will have responses to what I've just said, but this is not the place to get into this more fully.) But notice that my argument here against Sola Scriptura is not based merely on the fact that people trying to use it disagree, but on a substantial examination of what the Bible actually says. I think that, perhaps, sometimes Catholic apologists have good reasons to oppose Sola Scriptura but mix those good reasons up with not-so-good ones. You can see how it would be easy to do this. "Sola Scriptura is not feasible, because it doesn't provide enough information to decide important issues. Because it is not feasible, people using it aren't able to agree. Therefore, their disagreement is evidence of Sola Scriptura's non-feasibility." The fallacy here is that while it is true that widespread Protestant disagreement should be seen as a symptom of Sola Scriptura's non-feasibility, it is not the case that this means that widespread Protestant disagreement by itself
proves Sola Scriptura's non-feasibility, as if there couldn't possibly be any other explanation for such disagreement worth considering.
ADDENDUM:
Here's an article raising some similar issues from an Eastern Orthodox point of view.
ADDENDUM 3/6/24: In
another article, I've discussed another reason why Sola Scriptura naturally tends to lead to division:
For one thing, even if Scripture is perfectly plain and clear in its teachings, the lack of a human supreme doctrinal court tends to contribute to a significant amount of anarchy and division among Protestants. It is evident why that would be the case, when we understand human nature. A church may have come to the correct understanding of Scripture, and enshrined that understanding in their confession of faith. A church member comes along and opposes that teaching. The church attempts to discipline that member, but the member says, "I have the right and duty to conduct my own investigation into the meaning of Scripture. I have done so, and I find your interpretation incorrect. So, since Scripture is a higher standard, a higher court of appeal, than you are, and since you disagree with Scripture, I have a right and a duty to refuse to submit to your discipline and to continue to promote what I see Scripture as teaching. We must obey God rather than men." There is no human court to which both sides in this dispute can turn to adjudicate this difference over the proper interpretation of Scripture, so this controversy must end at an impasse, practically speaking, unless one side changes their view. The two sides will go their separate ways, both insisting that they are right because they are in accord with the true supreme standard--the Scriptures.
Here is a statement of this problem coming, not from a Catholic, but from an Atheist Libertarian author:
The likelihood of conflicting interpretations of special revelation did not pose as much of a theoretical problem for Catholics as it did for Protestants. In the Catholic Church the pope was the ultimate arbiter of doctrinal controversies. His function was rather like that of the Supreme Court in American law; what the pope said was final, and that was the end of the matter (at least in theory). But Protestants, in rejecting papal authority and in maintaining that each person should use his or her own conscience to understand Scripture, generated a serious problem for themselves. Hundreds of Protestant sects arose, and their conflicting interpretations of the Bible frequently spilled over into politics. Thus Catholic critics of Luther, Calvin, and other Reformers were basically correct when they predicted that the Protestant approach to the Bible would result in a type of religious anarchy, as each individual viewed himself as the supreme authority in religious matters. Reverting to my previous analogy, the result was similar to what would happen if America had no Supreme Court, or judicial system of any kind, and each American was free to interpret and implement law according to his own judgment.