这谚语用中文表达怎么显得这么怪异呢？

想了半天，确实没有好的中文对应。这短短的一句话挺有科学精神，奥卡姆剃刀定律在里面呢，咱老祖宗还真没这思路。

网上找了几句反驳这句话，笑死。

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 looks like a duck and quacks like a duck but it needs batteries, you probably have the wrong abstraction.