Lincoln-Douglas is judged by a single judge per round. Unlike Policy debate, where most judges have years of experience and well-known paradigms, LD draws judges from across the spectrum — parents recruited by their schools, community members, former debaters returning as alumni, coaches, college students, and full-circuit judges. What they evaluate and how they evaluate it varies more than in any other US debate format.
This guide is for anyone judging an LD round who wants to do it well. Especially: parents and community members judging their first tournament, coaches briefing their judges, former debaters returning to the activity, and students who want to understand how their judges actually think.
If you are judging your first round in an hour and need the minimum: flow the speeches (take structured notes), track which arguments were dropped, evaluate the framework debate (value and criterion) before the substantive debate, weigh impacts comparatively, and write a decision that explains why you voted the way you did. The rest of this post is the detail behind each of those steps.
Skim the Lincoln-Douglas format guide for speech times and round structure. Open your Tabroom paradigm and add a one-line note saying you are new — that lets debaters slow down for you. Bring paper and at least two pens. Plan to flow on paper unless you have specific laptop-flow experience.
The job is to evaluate the quality of the arguments made in the round, weighed against each other through the framework the debaters established. It is not the job to evaluate who is the better speaker overall, who you personally agreed with, or who looked more prepared. Stage presence, prior knowledge, and preparation matter at the margins of speaker points but should not determine the win-loss decision.
Every LD case is built around a value premise (an overarching moral concept the debater wants you to prioritise — justice, morality, governmental legitimacy, individual liberty), a value criterion (the standard for measuring whether the value is upheld — maximising utility, respecting Kant's categorical imperative, protecting natural rights), and two to three contentions (the substantive arguments). For a deeper breakdown of how LD cases are constructed, see how to write a Lincoln-Douglas case.
Your evaluation runs in the opposite direction of how cases are written. The debater builds upward — value first, criterion next, contentions last. You evaluate downward — first decide which framework controls the round, then evaluate which contentions survived under that framework, then weigh the surviving impacts to pick a winner.
If the debaters have access to your Tabroom paradigm, the inverse is sometimes also true — you can sometimes see notes about both teams. More importantly, debaters will adapt their case and delivery to your paradigm if you have written one. A judge with no paradigm gets the debater's default style, which on the national circuit is often very fast and technical.
If you have not written a paradigm, write at least a few sentences before the tournament. See the Tabroom paradigm setup guide for what to include. The minimum useful paradigm covers four things:
Lay out your flow sheet before the AC begins. The standard LD flow has five columns:
Use landscape orientation if on paper — you need horizontal room for five columns. Either a separate sheet for the framework debate (value, criterion) and the substantive debate (contentions), or one sheet with horizontal lines dividing them, works.
Flowing is the most important judging skill. Without a flow, you cannot tell what was dropped versus what was answered — and dropped arguments decide more LD rounds than any other single factor.
You do not flow word-for-word. You flow tags (the debater's one-sentence summary of each argument), the source (just the author and year), and responses (what the other side said back). Abbreviations help: V for value, VC for value criterion, C1 and C2 for contention 1 and 2, xtnd for extend, resp for response, turn for an argument that flips against the side that ran it, drop for an unanswered argument.
Each row of the flow tracks one argument from where it was introduced through every subsequent speech. Framework arguments (the value, the criterion, the standard) go at the top in their own rows. Contentions get their own rows beneath. When a debater responds to an argument, write the response in the next column over from the original. The visual structure makes dropped arguments stick out — any cell that is empty when it should not be is an argument the opponent failed to answer.
For more on flow sheet structure with a worked example showing how arguments move across columns, see the flow sheet section of the case-writing guide. It is written for debaters but the structure is identical for judges.
Call "clear" if the debater is unclear (you cannot understand the words). Call "slow" if they are clear but you cannot flow at that speed. Both are conventional signals in LD and the debater is expected to slow down. Do not flow what you did not hear — judges who fake the flow always make worse decisions than judges who admit they missed something.
The framework debate controls how you evaluate everything else. Always resolve framework first.
If both sides have the same value (or compatible values) and the same criterion (or compatible criteria), there is no framework debate. Skip to evaluating contentions through that shared framework.
This is common in traditional LD rounds — both sides might run justice with a utilitarian criterion, or morality with the categorical imperative. The whole round then turns on which side's contentions are better supported under that shared framework.
If the AC runs "Value: Justice. Criterion: Maximising utility" and the NC runs "Value: Morality. Criterion: Kant's categorical imperative" — you have a framework debate. Look at:
Once framework is resolved, evaluate each contention through the criterion that won. A contention that links beautifully to a utilitarian criterion may not link at all to a Kantian one. If the winning framework cannot evaluate a contention, that contention does not count toward the impact calculus.
Work through each contention separately. For each one:
If both sides have surviving contentions that pass the framework test, you have to weigh them. Weighing is what debaters do (or fail to do) to tell you HOW to compare impacts. The standard weighing mechanisms are:
| Mechanism | What it asks |
|---|---|
| Magnitude | How big is the impact? Larger impacts outweigh smaller ones. |
| Probability | How likely is the impact to actually happen? A small certain harm can outweigh a massive unlikely one. |
| Time frame | When does the impact occur? More immediate impacts often outweigh distant future ones — though debaters can argue this either way. |
| Scope | How many people (or beings) are affected? Broader impacts usually outweigh narrower ones, all else equal. |
| Reversibility | Can the harm be undone? Irreversible harms (death, extinction, permanent rights violations) outweigh reversible ones. |
| Strength of link | How clearly does the contention prove the impact follows from the resolution? A strong link to a small impact can outweigh a weak link to a big impact. |
The best debaters weigh comparatively — "even if the negative wins their impact, my impact outweighs because..." If both sides do this well, your decision is mechanical: you apply the weighing they gave you.
If neither side weighed at all, you have to do the weighing yourself. This is bad for both debaters (a judge weighing without guidance often weighs in ways the debaters did not anticipate) but it is unavoidable. State your weighing explicitly in the RFD so the debaters know what you did.
The RFD is the most important thing on the ballot. Debaters and coaches read it to understand how the round was decided. A good RFD has three parts:
I voted for the Affirmative. The framework debate went to the Affirmative because the Negative dropped the value-to-criterion link in the 1AR — they argued Kant's categorical imperative without explaining how it measures morality differently than the Affirmative's utilitarian standard. Under the controlling utilitarian framework, the Affirmative's Contention 1 (concrete harm from inaction) was extended through the 1AR and 2AR with new warrants in each speech; the Negative's response in the NR (that consequences cannot determine moral status) did not link to the controlling framework and was outweighed by the AC's magnitude and probability claims.
Aff feedback: strong framework defence; consider doing more weighing in the 2AR even when you are winning. Neg feedback: do not drop framework arguments to spend more time on contentions — even 20 seconds of framework defence in the 1AR would have kept this round close.
Most US tournaments now allow oral RFDs in addition to the written ballot — you deliver the RFD verbally to the debaters at the end of the round, then submit a brief written version on Tabroom. Some tournaments restrict oral RFDs in elimination rounds to prevent post-round arguments.
The oral RFD can be more conversational; the written one must stand alone since the debaters will read it later without context. Write the written RFD with enough detail that a debater reviewing the ballot a week later knows exactly why they won or lost.
Speaker points are scored independently of the win-loss decision. They are used for seeding (when multiple teams have the same record) and for awards (best speaker awards). The standard NSDA scale runs from roughly 25 to 30, in 0.5 increments at most tournaments and 0.1 at some.
| Points | What it indicates |
|---|---|
| 30 | Best speech you have ever heard. Reserve for exceptional rounds you may judge once a season or once a career. |
| 29 — 29.5 | Excellent. Clean delivery, strong strategic choices, polished case construction. |
| 28 — 28.5 | Above average. Solid round at the level of the tournament. |
| 27.5 | The default starting point. Average competent debate. |
| 27 | Slightly below average — minor issues with clarity, organisation, or strategy. |
| 26 | Significant issues — unclear delivery, dropped arguments, weak organisation. |
| 25 or below | Serious problems — rudeness, unpreparedness, technical violations. Reserve for cases where you want the tournament to notice. |
Speaker point conventions vary by region and tournament. Lay-judge-heavy tournaments often inflate (everyone gets 28+). Circuit tournaments often deflate (27 is genuinely average). Read the tournament's invitation or ask the tab room if you are unsure what range to use.
Use speaker points to reflect things that the win-loss decision cannot capture: speaking quality, time management, professionalism, civility. If a debater wins the round but was rude or unprofessional, give them the win on arguments and dock their speaks. This is the standard way LD handles unprofessional behaviour without overruling the substantive debate.
You have personal views on the resolution. You also know more than the debaters about some topic that came up. The temptation is to vote based on your own conclusions rather than what was actually said in the round. This is called judge intervention and it is universally considered bad LD judging.
Fix: vote only on arguments that appear on the flow. If you find yourself reaching for an argument the debaters did not make, stop. The debate is decided by the debaters, not by you.
The Affirmative was more confident, made better eye contact, and sounded more polished. The Negative was nervous but made stronger arguments and won more flow rows. The temptation is to vote for the more impressive speaker.
Fix: speaking style goes in speaker points. The win-loss decision goes on the flow. If the Negative won the arguments but spoke poorly, give the Negative the round and lower their speaks if the delivery genuinely hurt the round's quality.
You can't reconstruct a 35-minute debate from memory. Judges who try always miss dropped arguments — the most important single factor in most LD decisions.
Fix: flow every round, even if you feel confident about your memory. Even a sparse flow is better than no flow. If you are new to flowing, start by tracking just the framework arguments and the contention tags — leave evidence and warrants for later as you build the skill.
Neither side weighed impacts comparatively. You feel uncertain about which impact is bigger. You pick based on gut and write a vague RFD.
Fix: explicitly do the weighing yourself in the RFD. State the weighing mechanism you used (magnitude, probability, scope) and why you applied it. This gives the debaters something concrete to improve and produces a defensible decision.
The round was too fast for you to flow. You voted against the faster debater because you felt confused.
Fix: call "slow" during the round. Debaters expect this signal and will adjust. Voting against speed silently, after the round, is a form of intervention — the debater had no chance to adapt. If you did call "slow" and they did not adjust, you can mention it in the RFD as a reason for the decision.
An LD round takes 35 minutes. You spend 45 minutes deciding. The next round of the tournament is now late because of you. Other judges feel pressure to do the same.
Fix: aim for 10 to 15 minutes between the 2AR ending and ballot submission. Decide the framework debate first, decide which contentions survived, weigh, write three sentences, submit. If you are genuinely stuck after 15 minutes, that means the debate was close — pick the side you think has slightly the better arguments on balance and explain that close call in the RFD.
The same LD format produces dramatically different round styles depending on the circuit. As a judge, you may encounter either or both.
| Dimension | Traditional LD | Progressive (circuit) LD |
|---|---|---|
| Speed | Conversational, around 200 words per minute | Fast, often 300 to 400+ wpm, similar to Policy |
| Focus | Value-criterion framework + contentions | Often includes theory, kritiks, plans, counterplans |
| Evidence | Philosophy + some empirical | Heavily empirical, dense card-reading |
| Judges | Lay and parent judges common | Mostly experienced or former Policy debaters |
| Tournament types | Local, regional, novice/JV divisions | National circuit tournaments (TOC qualifiers, Glenbrooks, Bronx, etc.) |
If you are uncertain which style the tournament uses, ask the tab room or read the invitation. Most local and regional tournaments are predominantly traditional; most national circuit tournaments lean progressive. As a judge, you should write your paradigm to reflect what you are actually comfortable with — debaters will adapt, but only if they know what to expect.
A judge unfamiliar with theory or kritiks judging a circuit round is not doing anything wrong — but the paradigm should say so, so circuit debaters know to run traditional arguments instead.
Most US tournaments use Tabroom for ballot submission. After the round you log into your Tabroom account, find the round, enter the decision and speaker points, and submit. Tournaments usually want this within 15 to 20 minutes of the round ending.
If you are unsure how Tabroom works, ask a more experienced judge or the tab room before the first round of the tournament. The interface is unintuitive on the first use and worth practicing once before you are under time pressure.
Tournament rules vary. Some allow oral disclosure at the end of the round (you tell the debaters who won and your basic reasoning before they leave). Some prohibit disclosure in elimination rounds. Some require disclosure in all rounds. Check the invitation or ask the tab room before the first round.
If disclosure is allowed and you do it: keep it brief, decisive, and constructive. Avoid getting into post-round arguments with debaters — your decision is final, and the written ballot is where extended reasoning belongs.
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