Why These Puzzles Work

They rely on two common human tendencies:

• assuming something must happen
• overlooking small obstacles while searching for a quick answer
• Instead of asking where the water will go, the real question is where it cannot go.

A Good Lesson for the Mind

This puzzle reminds us to slow down and observe carefully. Sometimes the most important clue is not what’s visible—but what’s missing.

And now that you know the answer, chances are you’ll want to challenge someone else with it.