Those are things that when you forget them, you can take steps to re-learn them, because the information is publicly available. On the other hand, I am absolut

Those are things that when you forget them, you can take steps to re-learn them, because the information is publicly available. On the other hand, I am absolutely certain that I have truecrypt volumes on old backup drives somewhere that I haven't the foggiest idea what the corresponding passphrase is anymore.