'Certainly' in the Bible

What then? Are we better off? Certainly not, for we have already charged that Jews and Greeks alike are all under sin,

For if we have become united with him in the likeness of his death, we will certainly also be united in the likeness of his resurrection.

What shall we say then? Is the law sin? Absolutely not! Certainly, I would not have known sin except through the law. For indeed I would not have known what it means to desire something belonging to someone else if the law had not said, "Do not covet."