A 19-year-old in Hong Kong has been convicted of sedition for writing anti-government graffiti in a commercial building toilet, violating the city’s domestic national security law. West Kowloon Court on Wednesday rejected a defence psychiatrist’s opinion that a congenital mental disorder prevented Leung Kai-lok from understanding the offensive words he used against the government and police. Leung, 19, stood trial earlier this year before a magistrate hand-picked by the city leader to oversee...