affirmatio

1. A general figure of emphasis that describes when one states something as though it had been in dispute or in answer to a question, though it has not been. (Silva Rhetoricae)

2. 387. ASSERTION.
1. Strong emphasis is laid upon propositions when they are put forth with a positive declaration of their truth; for then the speaker assumes that from his assertion there can be no appeal:
"Besides, sir, we have no election. If we were base enough to desire it, it is now too late to retire from the contest. There is no retreat but in submission or slavery."-P. HENRY. (De Mille)

3. Spontaneous Affirmation. Affirmation becomes a Figure when it is used otherwise than in answer to a question; or, instead of a bare statement of the fact. It emphasizes the words thus to affirm what no one has disputed. (Bullinger, 929)

2. "This embargo must be repealed. You cannot enforce it for any important period of itme longer." -JOSIAH QUINCEY. (De Mille)

3. The Apostle uses it in Phil. 1:18, "What then? notwithstanding, every way, whether in pretence, or in truth, Christ is preached; and I therein do rejoice, yea, and will rejoice." (Bullinger, 929)