🔍 Catch the Lie
Logic / Speed · Free online · No download · No sign-up
Catch the Lie presents a statement on screen — about maths, science, geography, language, or everyday logic — and starts a countdown timer. True or false? You have seconds to decide. Some statements are obviously correct; some obviously wrong; and some are specifically designed to exploit overconfident fast thinking — plausible-sounding claims that most people get wrong on a timer. The game trains the calibration between your fast intuitive System 1 reasoning and the slower, more reliable System 2 verification — a skill that has measurable real-world value.
How to play Catch the Lie
- Read the statement displayed on screen as quickly as possible.
- Decide whether the statement is true or false based on your knowledge and reasoning.
- Tap the TRUE or FALSE button before the countdown timer expires.
- A correct answer scores a point; a wrong answer loses one; a timeout loses a life.
- Correct answers on a streak earn bonus multipliers — keep the chain alive.
- The timer shortens as your score increases, demanding faster and faster decisions.
Tips to beat your high score
- Eliminate impossible options first. For numerical statements, ask whether the answer is even in the right order of magnitude. “The sun is 150 billion km from Earth” is wrong by a factor of 1000 — catching the scale is faster than recalling the exact figure.
- Watch for qualifier words. Statements containing “always,” “never,” “all,” or “only” are frequently false because absolute claims are rare in nature. Statements with “usually” or “most” are more often true.
- Flag your confident-wrong answers. When you answer quickly and confidently and still get it wrong, note the type of statement. These are your personal knowledge gaps or systematic biases — prime candidates for deliberate review.
- Use base-rate reasoning. If you have no idea whether a statement is true, ask “is this the kind of thing that tends to be true or false?” Counterintuitive science facts are more often true in this game; common-sense observations are more often false.
- Keep a steady rhythm. The most points come from maintaining a long accuracy streak, not from answering as fast as possible. Slightly slower correct answers score more than fast wrong ones when the streak multiplier is active.
What this game trains your brain to do
Catch the Lie is built on the framework of dual-process theory, popularised by Daniel Kahneman in “Thinking, Fast and Slow.” System 1 thinking is fast, automatic, and associative — it produces an immediate feeling of “true” or “false” without explicit reasoning. System 2 is slower, effortful, and logical — it verifies the System 1 answer. Under time pressure, people rely more heavily on System 1, which is why carefully crafted misleading statements score so many correct taps — the System 1 answer is wrong but the timer prevents System 2 from correcting it.
The specific cognitive skill Catch the Lie trains is epistemic calibration — knowing how confident to be in your own knowledge on a given question. Well-calibrated people know when they know something reliably and when they are guessing, and they adjust their confidence accordingly. Research in decision-making shows this is a trainable skill: repeated exposure to cases where your confident fast answer was wrong gradually recalibrates your threshold for acting on intuition versus pausing to verify.
About Catch the Lie
Catch the Lie was designed to be as fair as it is challenging. Statements are drawn from domains that do not require specialised expertise — basic science, common logic, numerical reasoning — so players from any background start on comparable footing. Cultural or geographical knowledge advantages are minimised by design.
All CrizBrain games are free and run entirely in your browser. No account, no install, and your best streak is saved locally on your device. Play Catch the Lie for two minutes as a mental sharpener, or challenge a friend and compare your truth-detection instincts head to head.