AI Learns the Art of Debate

Project Debater is the first AI system that can debate humans on complex topics. The goal is to help people build persuasive arguments and make well-informed decisions.

What is Project Debater?

Project Debater is the first AI system that can debate humans on complex topics. Project Debater digests massive texts, constructs a well-structured speech on a given topic, delivers it with clarity and purpose, and rebuts its opponent. Eventually, Project Debater will help people reason by providing compelling, evidence-based arguments and limiting the influence of emotion, bias, or ambiguity.

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In development since 2012, Project Debater is IBM’s next big milestone for AI, following previous breakthroughs like Deep Blue (1996/1997) and Watson on Jeopardy! (2011).

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Learn the basics


What is the purpose of Project Debater? 

Why teach a machine how to debate? 

How is this different than a keyword search?

Debate proceedings

What is the format of the debate?

Is the Debater system actually listening to the human debater?

Can Project Debater argue both sides? 


How does Project Debater learn a topic?

How does Project Debater form an argument?

How does the Debater system know if a claim is for or against the topic it's given?

IBM Debater Speech by Crowd screenshot

Participate in a debate

Project Debater - Speech by Crowd, a new and experimental cloud-based AI platform for crowd-sourcing decision support. Project Debater - Speech by Crowd uses AI to collect free-text arguments from large audiences on debatable topics and automatically construct persuasive viewpoints to support or contest the topic. After the AI analyzes the arguments for their polarity, strength and relevance to the topic, the results are displayed on this indicator scale.

AI will bring more harm than good.

Join the debate

live debate

Learn more about Project Debater


How it works 

Project Debater relies on three pioneering capabilities: data-driven speech writing and delivery, listening comprehension, and the modeling of human dilemmas.


Why is it important? 

The world is awash with information, misinformation, and superficial thinking. Project Debater pushes the frontiers of AI to facilitate intelligent debate so we can build well-informed arguments and make better decisions.



The Project Debater team has publish their technical work in various top quality scientific conferences. So far, more than 30 works have been published, or are under review, in various research domains.