我真的对此一无所知。

Honestly, I don't know anything about it.

《柯林斯英汉双解大词典》

即便是他的亲信都对此一无所知。

Even his closest colleagues appeared not to have known about it.

youdao

我对此一无所知一点儿也不知道！

I knew nothing about itnothing!

youdao

There are other people who come to these classes ; who grew up in a non-religious context; they know nothing about this.

还有一些来上这门课的人,无任何宗教背景;,对此也一无所知。

耶鲁公开课 - 新约课程节选

I would say the one that says you can't learn anything from this is an outlier.

但如果有人说你们从中学不到什么,那他对此一无所知

耶鲁公开课 - 古希腊历史简介课程节选