Practice against an AI that argues back.
Any motion, either side, out loud. The AI opens against you and answers what you actually said. A separate judge scores the round and writes a ballot that shows its work.
Speak, get answered, get scored.
It is a round, not a chat. The AI does not summarise your point and move on. It attacks it.
Set the motion and your side
Paste the resolution you are prepping, or take one from the list. Pick Pro or Con. Con is where most people find out what their case is missing.
Argue by voice
You speak, it speaks. It responds to the warrant you gave, not the one you meant to give. A transcript builds as you go.
Read the ballot
A separate AI judge reads the full transcript, scores both sides, and names the exact claim that went unsupported. Then you run it again.
The ballot shows its work.
Not "the AI is right". The judge applies the same standard every round, writes down what it weighed, and you can disagree with it line by line. How it is kept from being gamed is public at judge integrity.
Pro's second contention asserts that congestion pricing "always" reduces traffic but offers no mechanism or example. Con's response, that pricing shifts traffic to the ring roads, went unanswered in rebuttal and is weighed as conceded.
Reps, before the round that counts.
Run your case before a tournament
Paste the resolution, argue your side, and hear the opposition you did not prepare for. Current topics for every format are on Debate Prep.
Practice the side you hate
Take Con on your own motion. If you cannot argue it, you do not fully understand the Pro.
Check an opinion before you post it
Not a debater? Type what you believe and see if it survives three minutes of pushback. Debate the Devil is built for exactly that.
Before you start
Is it voice or text?
Voice. You talk and it talks back in real time. The transcript builds on screen as you go and the judge reads that transcript at the end.
Does it actually push back, or does it agree with everything?
It is told to argue the other side and keep arguing it. It will not concede because you sounded confident. If your point is good it has to answer it, and you will hear it try.
Can I practice a specific format?
You set the motion, so any format's topic works. Format rules, speech orders and the current resolutions live on Debate Prep, and the practice round itself runs on Debatable.
How is this different from Debate the Devil?
Same engine, different door. Debate AI is for a motion you are preparing. Debate the Devil is for a belief you hold. If you are not sure which you have, start here.
Who makes this?
The people behind Debatable, where people debate each other on video. The AI round runs there; this site is the door for people who want the AI opponent.