Why is this example non-encyclopedic? It's an informative, falsifiable statement that could be supported by a citation, like here: https://en.wikipedia.org/wiki

Why is this example non-encyclopedic? It's an informative, falsifiable statement that could be supported by a citation, like here: https://en.wikipedia.org/wiki/Thongbu_Wainucha#:~:text=remembered%20as%20a%20cautionary%20tale%20of%20betrayal%20in%20battle https://en.wikipedia.org/wiki/Thongbu_Wainucha#:~:text=remem...