It is a very inconvenient habit of kittens (Alice had once made the remark) that, whatever you say to them, they always purr. "If they would only purr for 'yes,' and mew for 'no,' or any rule of that sort," she had said, "so that one could keep up a conversation! But how can you talk with a person if they always say the same thing?" (Looking-Glass 12.2)
