This riddle has been around for some time on internet platforms such as Instagram, Facebook, and WhatsApp, and many people still argue over what the answer might be, as there are many possibilities. The correct answer is They are both lying. Scenario 1: If the child with brown hair is lying, he is a boy. Then the child with blond hair must be a girl since there is a boy and a girl and thus is also lying. Scenario 2: If the child with brown hair is not lying, then she’s a girl. Since at least one of them is lying, the child with blond hair must be lying and would be a girl also, which is impossible. So the only possibility is the scenario where both are lying.