“Tornado rearranges DC highway into giant peace sign” could happen, theoretically, but it’s very unlikely to.

That would be an example where I can apply my existing knowledge, I know enough about tornados, highways, and peace signs to know that’s statistically improbable.

Whereas “Government appoints new head of some environmental division” I don’t know, sounds perfectly reasonable and plausible, but I couldn’t possibly say. In real life I could reason that a newspaper would have no reason to make up something so mundane (that’s why context is important), but knowing this is a test with fake answers makes it random chance.