Fa. If they are alike, how do you know one horse from another?
Ch. They are not quite alike.
Fa. But they are so much alike, that you can easily distinguish a horse from a cow?
Ch. Yes, indeed.
Fa. Or from a cabbage?
Ch. A horse from a cabbage? yes, surely I can.
Fa. Very well; then let us see if you can tell how a horse differs from a cabbage?
Ch. Very easily; a horse is alive?
Fa. True; and how is every thing called which is alive?
Ch. I believe all things that are alive are called animals.