Learn these six concepts and the format-specific guides, motion archives, and practice rounds below click into place. Read once before you compete; come back when you stall.
Every argument has three parts. The claim is the position. The warrant is the reasoning that makes the claim true. The impact is why anyone should care.
"Corporate political donations corrupt democracy" is a claim with no warrant. The complete version: "Corporate donations corrupt democracy because elected officials demonstrably vote with donor interests over voter interests (Page and Gilens 2014 showed near-zero correlation between bottom-90% policy preferences and actual outcomes), which means representative democracy stops representing the median citizen."
Judges decide rounds by weighing competing impacts on four axes. Magnitude is how big. Probability is how likely. Timeframe is how soon. Reversibility is whether it can be undone.
A small certain harm outweighs a large speculative one. An irreversible harm outweighs a reversible one of equal size. A near-term harm outweighs a long-term one when both sides have winnable paths. A high-probability high-magnitude impact dominates everything.
Five ways to attack an opponent's argument, in rough order of strength. Link attack: their argument doesn't connect to the world. Warrant attack: their reasoning fails on its own terms. Impact attack: even if true, the harm is small or speculative. Mitigation: yes, but less. Turn: their argument actually helps your side.
The strongest move is the turn. Prove their argument cuts against them and you've taken an entire contention off the flow with one move.
Judges flow rounds in real time on paper. If they can't track which argument you're on, they can't write the ballot in your favor. Signpost like a wayfinding system: "I'll address three of Opp's contentions. First, economic harm. Second, civil liberties. Third, enforcement cost." Then for each: "Moving to their economic-harm contention. Three problems."
The single biggest gap between novice and varsity debaters is signposting. Novices argue; varsity narrates the round in a way the judge can flow.
Cross-examination, crossfire, and points of information are shared airtime where the goal isn't to "win" the exchange. It's to plant ammunition for your next speech. The best questions aren't questions. They're concessions you want your opponent to make on the record.
"Would you agree that your evidence is global, not localized?" beats "Why do you think this matters?" Never ask why. Why hands them a free 45-second speech.
Two debaters can make the same arguments and only one of them sounds like they should win. Register is the difference. Varsity: clean signposting, direct address, real numbers over abstraction, one memorable line per speech, no announcing what you're about to say.
Novice tells: "Let me break this down" (just break it down). "In today's world" (start the argument). "I'd like to argue that" (just argue). Wall-of-words paragraphs without internal structure. Philosopher name-dropping when the motion doesn't call for it.