Example claim: School uniforms make everyone feel equal. Teams quickly predict what kind of evidence would actually prove it.
Language demo 02
The Evidence Auction Challenge
A fast argument game where teams buy, defend, and reject evidence. Each team has a limited budget, so students have to decide which cards actually prove the claim and which cards are only tempting.
Auction File
- Audience
- Any student-run club, 3-5 students per team
- Materials
- Claim card, auction tokens, evidence cards, bidding sheet, repair worksheet
- Goal
- Distinguish strong, partial, irrelevant, emotional, and misleading evidence
- Win condition
- Build the strongest repaired argument with the fewest weak cards
How to play
Students are not collecting evidence. They are judging it.
The room starts with one debatable claim and a table of evidence cards. Some cards are useful, some are only partly useful, and some are traps. Teams spend tokens only on the evidence they are willing to defend out loud.
Teams read all evidence cards before spending. A card can sound related to uniforms without proving equality.
Each team gets 10 tokens. They place tokens on cards and write one reason for each bid.
Each team defends one bought card, rejects one tempting weak card, then repairs the argument with its best evidence.
Sample round
The trap is the point.
A team might want to buy "Uniforms look neat in school photos." It is connected to uniforms, but it does not prove that students feel equal. A stronger bid is "Uniforms can reduce visible clothing-brand differences during the school day," because it directly speaks to social comparison.
What earns points
- +2 for each strong evidence card the team can defend
- +1 for naming why a partial card needs more explanation
- +1 for rejecting a tempting but weak card
- +2 for a repaired argument that uses evidence, not just opinion
- -1 for relying on irrelevant or emotional evidence as proof
Ready to print
Printable pieces for one auction round.
The printable kit includes the claim, tokens, evidence cards, bid sheet, repair worksheet, and debrief key. The demo topic is school uniforms, but the format can hold any claim with a few strong cards and several attractive traps.
A short debatable claim that sounds plausible but needs proof.
Each team receives the same limited budget, usually 10 tokens.
Cards include strong, partial, irrelevant, emotional, and misleading examples.
Teams record why each card is worth buying before the auction closes.
Teams rebuild the argument with only the evidence they can defend.
The facilitator names why attractive evidence can still be weak.
Card types
Not all evidence earns the same bid.
Teams learn that evidence has jobs. A card can be interesting, emotional, or related without actually proving the claim.
Directly supports the claim and can survive a "so what?" question.
Useful, but needs a second card or clearer explanation.
Sounds connected to the topic but does not prove the claim.
Persuasive in tone, weak as proof.
Looks strong until the team checks what it actually shows.
30-minute run
Bid, defend, repair.
The auction gives the room energy, but the learning happens when teams defend their bids and rebuild the argument with fewer, better cards.
Evidence Auction
- 0:00 - 0:03 · Claim reveal and token budget
- 0:03 - 0:08 · Preview evidence cards
- 0:08 - 0:16 · Silent bids and auction close
- 0:16 - 0:22 · Defend one bought card and reject one tempting card
- 0:22 - 0:28 · Repair the argument
- 0:28 - 0:30 · Debrief: strongest card, weakest card, biggest trap