Premise: Wound and rip and tear ! ''<br>That is what the terrible guns roar from morning to night at Mrs. Quack and her friends as they fly on their long journey to their home in the far North .<br>I do n't wonder that she was terribly uneasy and nervous as she sat in the Smiling Pool talking to Peter Rabbit ; do you ?
Hypothesis: Mrs. Quack, like elephants and ostriches, is incapable of flight.