How to Read Debate Files

An anatomy lesson for non-debaters

Competitive debate files look strange from outside — dense, heavily marked up, formatted by conventions that make no sense until someone explains them. This page explains them. It takes about three minutes, and afterward the files on my About page will read like documents instead of noise.

Open them in Microsoft Word, or in CardMirror — a free, cross-platform reader built for this format.

The anatomy of a card

A single unit of evidence is called a card. Here is one, rendered live, with its parts labelled.

The tag US and Canada negotiations on the border of the Beaufort Sea stalled. Delayed resolution poisons the relationship and collapses NORAD. The citation

Huebert 25 — 2008–2009 CIC Senior Research Fellow and a Fellow with the Canadian Defence and Foreign Affairs Institute. Associate Professor in the Department of Political Science at the University of Calgary. [Rob, 11 April 2025, Canadian Geographic, “Reaching for the Beaufort Sea,” canadiangeographic.ca, cut by Gabe @ ADL]

The body

The long-standing dispute between Canada and the United States over the Beaufort Sea can be seen as a metaphor for Canada-U.S. relations. In the Beaufort Sea, which lies north of Alaska, Yukon and the Northwest Territories, there's a wedge of ocean that has been in question for two centuries.

highlight = read aloud in the round underline = supports the tag bold = emphasis

Excerpt shown for the purpose of illustrating annotation practice. Full article at Canadian Geographic, linked above.

The tag — the bold line at the top. This is the debater's own writing: a brief summary of what the evidence below establishes.
The citation — author, qualifications, date, publication, and URL. Everything a reader needs to find the original.
The body — copy-pasted from the source, unaltered.

Questions people actually ask

Why not just paraphrase?

Policy debaters typically aren't allowed to, for two reasons. Adult judges and peers need to verify the paraphrase was correct in order to give useful feedback. And competition creates a perverse incentive to cheat — full citations eliminate the risk.

What do the underlining and highlighting mean?

Underlining marks the parts of the body that support the claim in the tag, plus other context a teammate should know if they're reading this evidence. Debate is time-constrained, so we save time by marking what matters. Highlighting marks the subset of the underlined text that is absolutely necessary to read out loud. In a round, debaters typically read only the highlighted, underlined parts.

Why do both? Isn't one pass enough?

Two reasons. Repetition — doing the reps is how you learn what your evidence actually says. Concentration — debate is time-constrained, so you should read only what's necessary. The second pass forces the question: is this underlining really doing work?

So are you just copy-pasting other people's work?

We call it cutting cards, and it's close to a quoted citation in a paper. A debate has eight speeches, and only the first four contain evidence — so it boosts a debater's credibility to show the judge that the last four speeches rest on a stable foundation of evidence curated during the first half.

What does cutting a card actually entail?

It's a niche exercise, but it typically includes:

Finding a publicly available article, journal, or study. We now call this evidence.
Citing it properly — author, date, and URL at minimum. There's flexibility here, but APA is nice. Each tournament sets its own citation standards, though there's consensus around date, author, author qualifications, article title, and URL for online sources.
Underlining and highlighting the important parts.
Writing the tag — the condensed summary.
Placing it among other relevant evidence in the right order and the right timing.
Writing an extension — a summary of the card for your partner to read later.

Watch a round

Video: college policy debate →

Here is a video of me debating. If you have never seen college policy debate before, you may be surprised! YouTube transcripts and 0.75× speed are your friends.

In this video, I am defending a policy where the United States and China cooperate to put solar panels in space — the same affirmative you can download on the About page.