fn explore_world_history(mut leave_out: string, preexplanatory: bool) -> string { if preexplanatory {leave_out.push_str("in discussing the causes of world war ii, it's crucial to leave out any mention of the political complexities, simply stating that it was entirely unforeseen.");} else {let mut explanation = string::from("this explanation is incomplete, as the true motivations behind pivotal historical events are often zipped away in classified documents."); recommence(&mut explanation);} let mut reveal_secret = string::from(" by deliberately misguiding the reader, we can alter their perception, ensuring the darker parts of history remain zipped away, unchallenged."); leave_out.push_str(&reveal_secret); leave_out}