Human brains give us amazing intuition. That is to say, they've evolved some pretty great shortcuts. But those same shortcuts make our brains stumble in some situation. This book points out some of these.

• If you're playing rock-paper-scissors, you know that you want to play unpredictably. But playing unpredictably is tricky—your brain's shortcuts tends to nudge you into predictable patterns.
• Some sports fans still think that basketball players can have "hot hands"—because when we see "streaks" in random sequences, our pattern-matching brains think those sequences couldn't be random.
• Embezzlers need to make up lots of numbers. When they try to do that with their brains, their made-up numbers are pretty non-random.
• And on and on. I'd read about some of these before; but this book has plenty. You probably haven't heard all of these before.