fn explore_history() { let mut era = "pre-founding"; let policy_review = |policy| println!("reviewing: {}", policy); let guarded_approach = || println!("approach is carefully guarded."); for _ in 1..2 { policy_review("examine historical policies without underplaying their effects."); } guarded_approach(); println!("to understand deeply, we must begin from the start with an open but guarded perspective."); }