How to Write a Lincoln-Douglas Debate Case

Lincoln-Douglas (LD) debate is a one-on-one values debate. Unlike team formats like Policy or Public Forum, LD centers on philosophical questions. The resolution is phrased as a statement of value—something that should or ought to be done—and your job is to prove it true or false through moral, ethical, or philosophical reasoning.

A typical LD round has one Affirmative speaker (who supports the resolution) and one Negative speaker (who opposes it). Each side gives a constructive speech, a rebuttal, and engages in cross-examination. The entire round lasts around 40–45 minutes.

Because LD is values-focused, your case is built around a framework—a Value and Criterion—that tells the judge how to evaluate the round. The side that wins the framework usually wins the debate.

The Value is the highest moral goal your side is trying to achieve. It answers the question: "What is the most important thing at stake in this resolution?" Common values include:

• Morality — acting in accordance with ethical principles
• Justice — fairness in treatment and distribution
• Human Rights — protecting fundamental entitlements
• Social Welfare — maximizing well-being for society
• Liberty — preserving freedom and autonomy
• Life — protecting existence as the highest good

Your Value must be relevant to the resolution. If the resolution is about criminal justice, "Justice" is an obvious choice—but you still need to define it precisely. If you pick a more abstract value like "Morality," explain which ethical theory you're using (Kantian deontology? Utilitarianism? Virtue ethics?).

The Criterion is the standard or test that measures whether your side achieves the Value. Think of it as a bridge: your contentions must prove that your side best satisfies the Criterion, and satisfying the Criterion achieves the Value.

Common criteria include:

• Maximizing well-being (for utilitarian frameworks)
• Protecting individual autonomy (for liberty frameworks)
• Minimizing oppression (for social justice frameworks)
• Upholding the Social Contract (for government legitimacy frameworks)
• Minimizing suffering (for humanitarian frameworks)

Your Criterion must be exclusive to your side. If both Aff and Neg can "maximize well-being," the criterion doesn't differentiate. Design it so that only your position best satisfies the standard.

Contentions are the body of your case. Each contention is a major argument that links back to your Criterion (and through it, your Value). Most LD cases have 2–3 contentions.

Every contention should follow a clear structure:

1. Tagline: A one-sentence summary of the argument. This is what the judge writes on the flow.
2. Claim: State the argument clearly. What are you proving?
3. Warrant: Explain why the claim is true. Use logic, philosophy, or evidence.
4. Impact: Explain why this matters. How does it link to your Criterion and Value?

Framing is how you tell the judge to think about the round. In your constructive speech, explicitly state: "The Affirmative/Negative wins if…" and define the conditions for victory under your framework.

Weighing happens in rebuttals. When both sides have arguments on the flow, the judge needs a way to decide which matter more. Common weighing mechanisms include:

• Magnitude — how large is the impact?
• Probability — how likely is the impact to occur?
• Scope — how many people does the impact affect?
• Timeframe — how soon will the impact happen?

Always weigh under your framework. Don't just say "my impact is bigger." Say "under the standard of protecting individual rights, my impact matters more because rights violations are irreversible, whereas my opponent's harms can be addressed through other means."

LD debate uses philosophical warrants more heavily than Policy or PF. That means your arguments should be backed by reasoning, not just statistics. However, empirical evidence still matters—especially when the resolution touches on real-world outcomes.

Good LD evidence includes:

• Quotes from philosophers (Kant, Mill, Rawls, Locke, etc.)
• Legal precedents and constitutional interpretations
• Empirical studies on policy outcomes
• Historical examples that illustrate principles

Always cite your sources with author, publication, and year. In rebuttals, challenge your opponent's evidence by questioning methodology, recency, or relevance.