When a new rule is introduced, the early panels can be easily solved by trial and error. However, it&#x27;s a mistake to continue until you can articulate the rule. That means experimenting with a panel even if you accidentally get the correct answer on the first try.<p>Edit: I&#x27;m reminded of this game from the New York Times from October: <a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2015&#x2F;07&#x2F;03&#x2F;upshot&#x2F;a-quick-puzzle-to-test-your-problem-solving.html" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2015&#x2F;07&#x2F;03&#x2F;upshot&#x2F;a-quick...</a>