“If it looks like a duck, quacks like a duck, it's a duck!”
“If it looks like a duck and quacks likes a duck, it's a duck, right?”
“You ever hear that expression 'If it looks like a duck and it quacks like a duck, it's probably a duck'?”
“If it looks like a duck, and quacks like a duck, we have at least to consider the possibility that we have a small aquatic bird of the family anatidae on our hands.”
“If it walks like a duck, quacks like a duck, and looks like a duck, it is a very unfortunate situation for the batting team. On the other side of the image, although being definitely unfortunatable for the batting team, it is most definitely a glorious silver lining for the bowling team.”