Public Forum vs. Lincoln-Douglas debate: a parent’s guide to understanding the difference

By Honor Academy · Cerritos, CA · Speech & Debate Coaches

If your child is interested in competitive speech and debate, you’ve probably heard the terms “PF” and “LD” thrown around — and wondered what on earth they mean. You’re not alone. Here’s everything you need to know, explained without the jargon.

First, what do PF and LD stand for?

PF stands for Public Forum debate. LD stands for Lincoln-Douglas debate. Both are competitive debate formats governed by the National Speech and Debate Association (NSDA) — the same organization that runs tournaments from local invitationals all the way to the national championship.

Both formats teach students to research, argue, and think on their feet. But they have different structures, different focuses, and tend to attract students with different strengths. Understanding the difference will help you and your child make the right choice.

What is Public Forum (PF) debate?

Public Forum is a team event — two students debate together as partners against another two-person team. Topics change every month and are based on current real-world events: things like U.S. foreign policy, economic issues, international relations, and social policy. The goal is to be persuasive and accessible — as if you were making your case to an everyday citizen, not an expert judge.

PF rounds typically run about 45 minutes. Each team has designated speaking times, plus a back-and-forth questioning period called “crossfire” — think of it like a structured rapid-fire exchange where students challenge each other’s evidence and reasoning.

PF is one of the most popular debate formats in the country, especially for middle school and early high school students, because it is very accessible for beginners while still being deeply competitive at higher levels.

What is Lincoln-Douglas (LD) debate?

Lincoln-Douglas debate is named after the famous 1858 debates between Abraham Lincoln and Stephen Douglas — and it has a similar feel. It’s a one-on-one format where a single student debates against a single opponent. There’s no partner, no team. Just your student, their opponent, and their arguments.

LD topics change every two months and tend to be philosophical and ethical in nature — questions about justice, morality, individual rights, and societal values. Instead of arguing purely from evidence, LD debaters build what’s called a “value framework” — essentially a philosophical foundation that explains why their position is morally or ethically correct.

Because it is a solo event, LD places more responsibility on each individual student. There’s no partner to pick up the slack, which makes it both more challenging and more rewarding for students who thrive independently.

Which one is right for your child?

There’s no universally “better” format — it depends on your child’s personality, strengths, availability and interests. Here’s a simple way to think about it:

Can students do both?

Absolutely, but not at the same time — and many of our students at Honor Academy do switch between the formats and prepare during the summer. The skills built in PF and LD complement each other beautifully. A student who starts in PF and develops strong research and evidence skills is well-positioned to transition into LD. And an LD debater’s deep philosophical reasoning often makes them a stronger, more thoughtful PF debater.

At Honor Academy, we work with each student individually to identify the format that suits them best — and as they grow, we help them expand their skills across multiple formats if they choose to.

What both formats have in common

Whether your child chooses PF or LD, the benefits of competitive debate are the same — and they go far beyond winning trophies. Both formats build the kind of skills that colleges actively look for and employers consistently value: