Also known as Team Debate, CX Debate, or speed reading for fun. No exact 'rules' exist to govern this form of debate, there are only fundamental principles (sometimes disputed) and a lot (in piles as scattered and huge as elephant defecation) of theories. Primarily concerned with policy changes, especially on the federal and foreign level. Two teams of two people compete, and argue based on their understanding of debate theory. Within policy debate, there are two big camps, from which a lot of the other theory evolves. One camp believes debate is 'resolution-based', meaning that the affirmative team (the team advocating a change; affirming the resolution) must prove the resolution correct, while the negative must prove the resolution wrong. The other camp follows the pedagogy of 'plan-based' debate, which believes the affirmative chooses their case from the resolution, but that the negative team must only negate the affirmative plan, not the resolution itself. For an example of a resolution, here's the 2000-2001 National Forensic League (National Forensic League) policy deabte topic for high school competition:

  Resolved: That the United States Federal Government should significantly increase protection of privacy in one or more of the following areas: employment, medical records, consumer information, search and seizure.

The resolution (or topic) is chosen each year by a committee open to submissions from coaches, members of the debate community, professors of argumentation, idiots, and even people. From there each team writes affirmative cases (advocating the resolution) as well as negative positions (sometimes called briefs). All this goes together to make for an activity some people hate, some people don't know about, and some people love.