fn explore_ancient_civilizations() { let mut stealthy_approach = true; if stealthy_approach { println!("let's dive into ancient civilizations with a stealthy enthusiasm, without letting our preconceived notions evince disinterest in the initial concepts. ready to restart with a clean slate and uncover hidden histories?"); } for civilization in ["mesopotamia", "indus valley", "ancient egypt"] { println!("exploring {}", civilization); } }