Sentence examples for knows whether from inspiring English sources

No one knows whether such fragments exist.

But who knows whether to believe him?

No one knows whether it will work.

Nobody knows whether I am or not".

But who knows whether demand will recover?

Who knows whether flossing works?

Who knows whether it's healthy?

Who knows whether it's ever been exploited?

God knows whether they'll ever work again".

Who knows whether this will catch on.

Nobody knows whether the problems might return.