That's pretty funny. It's like saying the Scripture isn't Scriptural. Believe me I've been around the mulberry bush a few times on this whole thing. I realize that oral tradition was very important BEFORE we had the Word written down but now that we've got it pretty much in print (for just a little while anyway), it's pretty safe to say that while it may not encompass EVERYTHING, if we do cling to the Scripture alone, we can feel pretty confident that the truths in there are okay.
Which canon? Catholics and Protestants use different canons. The ultimate and insurmountable problem for the doctrine of "Sola Scriptura" is that the Bible did not and can not canonize itself. Any argument for a particular canon must be extra-canonical and extra-scriptural.
For Catholics, that authority is Christ's Church, "the pillar and foundation of truth."