Panel 1: Two persons stansing in front of a wall that is not completely pastered. The left person holds a bucket full of concrete and a toothbrush. Right person: "Hi. What's up?" Left person: "I plaster this wall with an electric toothbrush." -- Panel 2: Right Person: "Why would you do that?" Left Person (points to a sheet of paper he holds): "This study shows that this is 45% more effective compared to manual toothbrushes!" Left Person: "Interesting." Subtitle: "Scientific reasoning"