moot

n. 大会,讨论会,辩论会
a. 未决议的,抽象论的
v. 使成为无实用性的东西

The question was first mooted many years ago.

这个问题是许多年前就提出的.

It's a moot point whether men or women are better drivers.

男女司机孰优孰劣尚有争论.