What is the best way to explain "plausible deniability" to a Mandarin speaker
According to this article


  在经济学领域，有一个概念叫既可以把它理解为‘合理推诿’(Plausible deniability)，也可以直观理解为“事后推卸责任的可能性”。


the exact translation of plausible deniability is 合理推诿. It can also be explained by 事后推卸责任的可能性 (the possibility of shirking responsibility after something bad happens).