a moot point
US /ə muːt pɔɪnt/
UK /ə muːt pɔɪnt/

1.
一个悬而未决的问题, 一个没有实际意义的问题
a subject or question about which people can argue or disagree, or about which it is not necessary to make a decision
:
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Whether the new policy will actually be effective is a moot point.
新政策是否真的有效是一个悬而未决的问题。
•
His guilt is a moot point, as he died before the trial.
他的罪行是一个悬而未决的问题,因为他在审判前就去世了。