The article discusses a social experiment where a lost child is approached by a stranger. The question posed is whether people would let the child go with the stranger or intervene to protect them. The article highlights the importance of being vigilant and cautious when it comes to the safety of children, as there are potential risks involved in letting them go with strangers. The experiment serves as a reminder for individuals to be aware of their surroundings and take action to ensure the safety of children in potentially dangerous situations. Ultimately, the article emphasizes the need for vigilance and intervention to protect children from harm.