A duck walks into a bar and asks: "Got any Bread?" Barman says: "No." Duck says: "Got any bread?" Barman says: "No." Duck says: "Got any bread?" Barman says: "No, we have no bread." Duck says: "Got any bread?" Barman says: "No, we haven't got any bread!" Duck says: "Got any bread?" Barman says: "No,...