The more the bats argue about whether they can be heard, the more the guy wonders what he is hearing. He's wondering what kind of murderous filthy critters are up there. He wonders whether they are able to get into his bedroom. He's also wondering if they will get louder when -and if- he ever gets to sleep. The good news for us is that the next time we hear strange noises in the attic, we know it's just the bats arguing about whether we can hear them. This comic is from They Can Talk.