Recently, R. C. Sproul, Jr., wrote a piece in order to answer the question of whether sola scriptura can be found in the Bible ("Is Sola Scriptura in the Bible?"). The reason why this question is worth answering is because it seems to the untutored mind that if one claims that the Bible is the standard by which all doctrine is assessed (sola scriptura) and the doctrine of sola scriptura itself is not taught in Scripture, then the doctrine of sola scriptura is self-refuting. Analogously, if X were to claim that all knowledge comes through the hard sciences, such a claim would be self-refuting, since the claim that "all knowledge comes through the hard sciences" is itself not a deliverance of the hard sciences though X claims to know it.
In any event, Bryan Cross, at Called to Communion, responds to Sproul's essay. Here are some excerpts from Cross's piece:
....Sproul first acknowledges that the Bible does not have a text that suggests that it alone is our final authority. Then he claims that Catholics and Orthodox who point this out are missing the point, because they are aiming their energies at solo scriptura. However, if the point of the Catholics and Orthodox who state this is straightforwardly to point out that the Bible does not have a text that suggests that it alone is our final authority, then these Catholics and Orthodox are not “missing the point,” but in fact making a true claim, one that Sproul himself acknowledges. We agree with Sproul that solo scriptura is “reprehensible.” But if, as Neal Judisch and I have recently argued here, there is no principled difference between solo scriptura and sola scriptura, then the fact that the Bible does not have a passage that suggests that the Bible alone is our final authority, is deeply problematic for those who claim that the Bible alone is our final authority.....
Sproul claims that “the Bible is our alone final authority because it alone is the Word of God.” Nothing he says here actually demonstrates that only the Bible is the Word of God. In other words, nothing Sproul says here shows that the oral teaching of the Apostles was not the Word of God, or that this oral Apostolic Tradition, as it was passed down orally in the Church, was not the Word of God. The Catholic Church agrees that the Bible is the Word of God written. That’s not the point of disagreement. The point of disagreement (between Protestants and the Catholic Church) regarding sola scriptura is twofold: First, whether the Word of God written is the entirety of the Word of God given to the Church from the Apostles, or whether the Word of God spoken, and orally transmitted and handed down by the succession of bishops, is also the Word of God given to the Church from the Apostles. Second, whether or not Christ established a unique interpretive authority by way of apostolic succession from one Apostle to whom Christ gave the keys of the Kingdom. Sproul’s prooftexts do not substantiate the Protestant position regarding either of those two points of disagreement.
If you want to read the whole thing, go here. If you want to read Sproul's essay, you can find it here.