Humans are supposedly rational: in other words, they have a capacity for well-considered thinking and behavior. This is supposedly the difference that makes them superior to other animals. But humans knowingly pollute the world' s precious air and water and, through bad farming practices, deplete the soil that feeds them. Thus, humans are not rational after all, so it is absurd to regard them as superior to other animals. The reasoning above is flawed in that it ['neglects to show that the irrational acts perpetrated by humans are not also perpetrated by other animals', 'presumes, without offering justification, that humans are no worse than other animals', 'fails to recognize that humans may possess a capacity without displaying it in a given activity', 'takes for granted that humans are aware that their acts are irrational']