If that doesn't mean bible alone then alone doesn't mean alone...
But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed. Galatians 1:8-9
If that doesn’t mean bible alone then alone doesn’t mean alone...
Really? Are you serious?
Do you really imagine that every word spoken by Our Lord is recorded in the Bible? Do you really imagine that the “gospel...that which we have preached unto you” refers to books which were yet to be written?
Saint Paul *preached* the Gospel to the Galatians. He didn’t give them a copy of the King James version.
There is much that was passed down sola word-of-mouth, and more that we received through personal revelations.