All-new edition · Coming soon

The cleverer you think you are, the easier you are to fool.

The cards you see here are already available - 24 fallacies you can print and play tonight, straight from our Etsy shop. Now we're turning that deck into something better: a brand-new, beautifully boxed edition of What's That Fallacy?, with sharper cards and better gameplay. Grab the print-and-play version today, or get first dibs on the new game below.

The companion book Launching alongside 24 Fallacies and the Historical Disasters that Followed
What's That Fallacy? card game — a fanned hand of cards showing Appeal to Emotion, Ad Hominem, Straw Man, Appeal to Force and Loaded Question with illustrated cat characters
24Fallacy cards
2–8Players
10+Ages
~60Mins play
A sneak peek

Meet the 24 fallacies you'll start spotting everywhere

Every card names the fallacy, nails the definition, and shows it in action - usually with Duchess committing it and Bruno falling for it. Here's a taste of the deck. The other nineteen are under wraps until launch.

No. 03
Straw Man Argument
Swap your opponent's real point for a weaker, sillier version — then knock that one down instead.
No. 06
Ad Hominem Attack
Out of arguments? Attack the person instead of the point they actually made.
No. 15
Appeal to Force
Win the debate with a threat. "Agree, or else" isn't evidence — it's a shakedown.
+19
more fallacies
revealed at launch
No. 21
Appeal to Emotion
Skip the facts and tug on feelings instead — fear, pity or outrage do the convincing.

By the end you'll be diagnosing your group chat. Want the full set in your hands first? Join the waitlist for the boxed edition, or grab the print-and-play deck on Etsy tonight.

Coming soon Product photography coming soon — this is a preview
The all-new boxed edition

Same sharp game. Now new, improved and gift-ready.

We took everything players loved about the original print-and-play deck and made it better: rewritten cards, fresh illustrations, and a sturdy keepsake box that looks as good on the shelf as it plays at the table. Built to be unwrapped, re-played, and handed around for years.

  • Premium linen-finish cards that survive family game night
  • A giftable box - no printing, no cutting, ready to play
  • All 24 fallacies, illustrated with Duchess & Bruno
  • Quick-start rules anyone gets in thirty seconds
The companion book

24 Fallacies & the Historical Disasters that Followed

Launching at the same time as the card game: the book that shows what happens when nobody spots the fallacy in time. Each chapter pairs one fallacy with a true history disaster - from witch trials to wars - so you don't just learn the trick, you see the wreckage it leaves behind.

Play the game to catch fallacies at the dinner table. Read the book to understand why catching them matters.

Game and book, launching together. Waitlist members hear about both first.
Coming soon Cover artwork coming soon — this is a preview
How to play

Thirty seconds to learn. Years of being unbearable at dinner.

Step 1 — draw a fallacy card from the deck and keep it secret
1

Draw a card — and keep it secret

One player is the Describer. They draw a fallacy card from the deck and don't show it to anyone else.

Step 2 — describe a scenario using the fallacy without saying its name
2

Commit the crime — without saying the name

The Describer invents a scenario that illustrates the fallacy. Everyone else races to guess which one it is.

Step 3 — correct guessers and the Describer each score a point, first to 10 wins
3

Score points — first to 10 wins

Correct guessers and the Describer each earn a point. First player to reach 10 takes the glory.

First to 10 wins!

Correct guessers and the Describer bank a point every round. Race to ten, then wear the "Most Insufferably Logical" crown with pride.

Winner takes the bragging rights. Everyone leaves a little harder to fool.
Players love it

From family dinners to classrooms

Nobody can stop calling each other out - in the best possible way.

★★★★★

"Really clever and funny comics. I wasn't expecting them to be so funny. My husband and kids really like them. We've placed the cards on the kitchen table to practice whenever we get a chance after dinner and they're a lot of fun! It takes a bit of practice but over time it sticks. Cute pics too."

S
SandraVerified buyer · Mar 2026
★★★★★

"These cards are amazing and so much fun. My family loves them, we're now catching ourselves using the fallacies which I didn't think would happen. That's such a bonus. Thank you for including the black and white copies, as my kids really enjoyed colouring them too. A 10/10 resource!"

K
KylieVerified buyer · Mar 2026

★★★★★ 5.0 from 2 reviews · 100% of buyers recommend it

Get first dibs

You've seen a taste - now claim the game & book first.

The all-new card game and the book land together in a few months. Join the waitlist and we'll tell you the second they exist - plus you'll get an early-bird launch discount before anyone else.

Launch-day discount First to know No spam, just the goods
— Can't wait a few months? —