There had to be something wrong with it, since he certainly wasn't a dolphin. However, maybe it was just an exception. He thought about, wondering if there were any other connections he could make. In a flash of insight, he saw that this instance was not singular at all, but easily repeatable, with similar results. Here's another one.
Turtles never leave their home.
My friend Peter never leaves his home. Therefore, Peter is a turtle. Peter objected, as the page sof Aristotle flipped over in the opposite direction. Peter bemoaned, wishing his limited mind could comprehend such matters. Peter and Andrew turned to look at the now open book, Andrew's face just as pale as his sickly friend's.