I wondered whether, if she had remained at Styles, the tragedy would have taken place, or would the man have feared her watchful eyes? 
I knew the tragedy would have happened, even if she'd stayed at Styles.
mnli hypothesis: I knew the tragedy would have happened, even if she'd stayed at Styles. premise: I wondered whether, if she had remained at Styles, the tragedy would have taken place, or would the man have feared her watchful eyes? 