Blog · Speaker roles
The second speaker: rebut, rebuild, extend
3rd Best APDA Debater · TOC Semifinalist · Columbia Debate Society Coach
Coaches argue about most things; almost none argue about this: the second speech is where rounds are won or lost. It is the only speech with three full-sized jobs (destroy the opposing case, repair your own, and deliver your team's final new argument) inside the same eight minutes as everyone else. Here is how each job works, and how they fit. (The fill-in version is the second speaker cheat sheet.)
Job one: rebut the best version of their case
The cardinal rule of World Schools rebuttal: respond to the strongestversion of what your opponents said, not the weakest. Judges flow the actual argument; if you beat a strawman, the real argument survives untouched, and you spent ninety seconds proving you either didn't understand it or couldn't handle it.
Structure every response the same way: “They say… however…” Tag their claim in one fair sentence, then break it. And always close the exchange with a conclusion: “This shows their argument fails because…” That last line converts a list of objections into a verdict the judge can write down. The full taxonomy of where to aim (premise, mechanism, impact, or weighing) is in our rebuttal guide.
Job two: rebuilding, the half everyone skips
By the time you speak, your first speaker's case has been attacked for eight minutes. A new argument stacked on a collapsed case impresses nobody, so before you extend, rebuild. The structure mirrors rebuttal: tag their response (“they said our inequality argument ignores scholarships”), answer it (“however, scholarships reach a fraction of one percent…”), and conclude: “so our argument still stands because…”
Rebuilding is also triage. You do not need to answer every response, only to save the material your team plans to win on. Check what your third speaker intends to make the round about, and make sure that survives your speech.
Job three: the extension, new ground for the same case
Your new argument is the team's last new material of the round. After you, only responses and weighing are allowed. Two properties make an extension strong. It is genuinely new: a different causal story, a different stakeholder, not argument one in a new outfit. And it is strategically placed: it hits from an angle their existing rebuttal cannot reach. That forces their third speaker to answer fresh material with no second speaker left to help.
Structurally it is a full argument (tagline, mechanisms with reasoning and examples, impact, weighing), never a footnote. If your extension runs ninety seconds, it is a comment, not an argument, and judges score it accordingly.
Where second speeches go wrong
- The line-by-line trap: answering all seven of their points shallowly instead of breaking their three important ones properly. Rebuttal is triage, not inventory.
- Skipping rebuilding entirely: the most common structural miss. If your case is rubble when the whip stands up, there is nothing left to weigh.
- The vanishing extension: spending six minutes in the clash and delivering the new argument as an afterthought at 7:30.
- No conclusions on exchanges: responses without a "this means their argument fails because…" line leave the judge to do your scoring work, and judges rarely do it in your favor.
Print the second speaker cheat sheet and run it against motions from the practice bank. The structure becomes automatic faster than you'd think.
Common questions
How should a second speaker split their eight minutes?+
A common starting budget is roughly three minutes of rebuttal and rebuilding, four minutes for the new argument, and a minute for framing and conclusion. Then adjust live. If the opposition landed real damage, rebuilding earns more time; if their case was weak, extend harder. The budget is a default, not a rule.
What makes a good extension argument?+
It should be genuinely new (not a re-worded version of your first speaker’s material), it should hit from a different angle so rebuttal against argument one doesn’t automatically apply to it, and it should still serve the same stance and metric. A good test: could the opposition’s existing responses answer it? If yes, it isn’t new enough.
Rebut first or rebuild first?+
Convention and logic both say rebut first: tear down their case while it is freshest in the judge’s mind, then repair your own, then build new material on the cleared ground. Whatever order you choose, signpost it. The judge should always know which of your three jobs you are doing.
Deputies are made in the clash.
Our weekly rounds put second speakers against live opposition, then hand them written feedback on rebuttal quality and time discipline.