No, it is not justified for a dad or anyone else to slap their 24-year-old daughter or anyone else over a petty issue or for any reason. Physical violence is never an acceptable way to resolve conflicts or disagreements. It is essential to treat all individuals with respect and dignity, regardless of their age or relationship.
Physical violence can cause physical and emotional harm, erode trust, and create long-lasting negative effects on relationships. Communication, understanding, and empathy are more appropriate ways to address conflicts or issues in a healthy and constructive manner. If there are disagreements or conflicts, it's essential to find non-violent and respectful ways to resolve them, such as through open discussions, seeking professional help if needed, or finding alternative solutions together.