We don't know whether this was because he didn't want to take the chance or because he believed in categorical moral principles.

不知道他是因为不愿意冒这个险呢,还是因为他信奉绝对主义道德原则。

耶鲁公开课 - 公正课程节选

We didn't know what was going on, didn't know whether he had done something.

CNN: FBI agents interviewed bombing suspect in 2011

On the first tee, people didn't know whether he was going to make a toast or hit a golf ball.

NPR: 'First Off the Tee': White House Golf Tales

Mr. Holder said he didn't know whether he put the recusal in writing but said that "might be the better practice" in such cases.

WSJ: White House Aims to Revive 'Media Shield' Bill