fn explore_reading(pass_by: string, previous: vec<string>, insight: fn(vec<string>) -> string, restart: bool) -> vec<string> { let sensitive_topics = vec!["privacy", "emotions", "cultural_identity"]; if restart { previous.clear(); } let mut reading_list = vec::new(); for topic in sensitive_topics.iter() { if !pass_by.contains(topic) { reading_list.push(insight(vec![topic.to_string() + " is a fascinating area to explore for deeper understanding."])); } } reading_list }