Text: How else can people understand tragedies such as Littleton, in which normal middle-class kids are not playing baseball or flirting with girls or even duking out their differences after school on the playground; they are nursing monstrous visions of murder and mayhem, while building bombs in their clueless parents' garage.
Entailment: In Littleton, normal middle-class kids are engaging in harmful activities, like building bombs in their garage.
Contradiction: The middle-class kids in Littleton engage in the usual things like playing sports and flirting with their crushes.