What is Daily Triplets?

Daily Triplets is a logic puzzle based on Wason's 2-4-6 task, a classic experiment on confirmation bias. A hidden mathematical rule determines which triplets of digits are accepted. You test triplets, receive feedback, and when ready, state the rule as a mathematical condition. Testing is unlimited; stating the rule is limited to three attempts.

How to play Daily Triplets

  1. Press PLAY to see one triplet that already satisfies the hidden rule.
  2. Type any three digits from 0 to 9 into the slots and press TEST. A tick means the triplet fits the rule; a cross means it does not.
  3. Continue testing as many triplets as needed. There is no limit on tests.
  4. Press I KNOW THE RULE and write the rule as a mathematical condition. You have three attempts.

Why the game works differently from most puzzles

Most daily puzzles present a fixed problem and ask for the answer. This one gives you an oracle and asks you to discover what it is thinking. The 2-4-6 task is famous because nearly everyone fails it in the same way: they only test cases they expect to pass and mistake confirmation for proof. Free testing against a hard limit of three statements creates exactly the right conditions to catch this trap in action.

Reading the feedback

Every test returns a tick or a cross. No hints, no partial credit, no explanations. All information comes from which triplets you chose to try. Your final equation is checked against all possible triplets rather than a specific wording, so any expression that accepts and rejects the same triplets counts as correct.

Tips for finding the rule

Try to disprove your theory rather than confirm it. It is easy to test triplets that fit a suspected rule, mark each success, and mistake that for proof. A failed test tells you more: if the rule survives an attempt to disprove it, you can state it with more confidence.

Tests cost nothing; wrong statements do. Keep testing. Three wrong statements end your day, while extra tests carry no penalty.

Change one digit at a time. That shows which position matters. Change all three, and you learn very little.

The rule connects the three digits. Look at their order, differences, sum, parity, and repeated values rather than treating any one digit as decisive.

Modes

Daily mode gives you one numbered hidden rule each day. The board starts with a single triplet known to fit.