I started studying Modern Japanese Grammar: A Practical Guide by Naomi McGloin et al. In section 1.2, there's the following example:
Which is translated as:
[Surprisingly,] no one knew the answer.
This translation sounds a bit off to me. I'd say that the sentence roughly translates to "[Surprisingly,] the person who know the answer is absent", which isn't equivalent to provided translation. I guess it'd be more adequate if the original sentence was something like "[おどろいたことに、] 誰も答えを知らない". I think that difference between "no one knew" and "person who know was not here" is quite stark. Second one implies presence of someone who know while first one does not.
Is this an error in the book or do I understand it incorrectly?