2AC

The 2AC (Second Affirmative Constructive) is the third speech in a standard policy debate round and the affirmative team's first opportunity to respond to the negative's opening arguments. In the conventional policy format used by the National Speech & Debate Association (NSDA) and the National Debate Tournament (NDT), it lasts 8 minutes, followed by 3 minutes of cross-examination by the 1NC speaker.

The 2AC's job is to answer every argument introduced in the 1NC — typically a mix of disadvantages, counterplans, kritiks, topicality violations, case attacks, and procedural objections. Because dropped arguments are generally treated as conceded in later speeches, the 2AC must be comprehensive even at the cost of depth. Debaters often prepare pre-written answer blocks (sometimes called "2AC blocks") for predictable negative positions.

Strategic functions of the 2AC typically include:

• Extending the 1AC: reasserting case advantages and adding new evidence where useful.
• Answering off-case: making multiple responses (often 5–8) to each disadvantage, counterplan, or kritik so that the 1AR has options.
• Theory and framework: setting up objections to conditionality, multiple counterplans, or negative framework interpretations.
• Permutations: against counterplans and kritiks, proposing tests of competition such as "perm: do both" or "perm: do the counterplan."
• Straight turns: converting a disadvantage into an affirmative offensive argument by conceding the link and turning the impact (or vice versa).

The 2AC is widely considered one of the hardest speeches in policy debate because of the breadth required and because mistakes here are difficult for the 1AR — a 5-minute speech — to repair. In Lincoln-Douglas and Public Forum the term is not used; in British Parliamentary and World Schools debate, speaker roles are named differently (e.g., Deputy Prime Minister).