Two wrongs don’t make a right 是個諺語，意為「冤冤相報何時了；以牙還牙於事無補；積非不能成是；別人對你所做的壞事並不表示你也可以對他們做相同的壞事」。
Two wrongs don’t make a right 通常被引用來告誡想要對某人尋求報復的人，因為冤冤相報何時了。這個諺語於 1783 年首次出現在美國獨立宣言 (Declaration of Independence) 簽署人之一的班傑明‧洛希 (Benjamin Rush) 所寫的一封信函中。
例句：
- Peter: I’d really like to humiliate Tom, after he made fun of me in front of everyone. (彼得：在湯姆當眾取笑我之後，我真的很想羞辱他)
Paul: Now, now, Peter. Two wrongs don’t make a right. (保羅：喂，喂，彼得。冤冤相報何時了) - You want to hurt Kevin just because he hurt you! Two wrongs don’t make a right, you know. (只因凱文傷害你，你就想要傷害他！你知道的，冤冤相報何時了)
- Two wrongs don’t make a right and if someone does something bad to you you should not try and hurt them as well. (以牙還牙於事無補，所以如果別人對你做了不好的事情，你不應試圖也要傷害他們)