CHOP LOGIC.
Tillie. "A man who keeps a bakery is a baker, isn't he?"
Billy. "Of course. And a man who keeps cellery is a seller, but a man who keeps a buttery isn't a butter, is he?"
Tillie. "A man who keeps a bakery is a baker, isn't he?"
Billy. "Of course. And a man who keeps cellery is a seller, but a man who keeps a buttery isn't a butter, is he?"