This was yet another failure by the Jedi Council. The prequels are plagued with their ineptness. Rebellion in their ranks. People changing the files in the library without their knowledge. The creation of a clone army while they were in the dark. The Dark Lord of the Sith right under their nose for years. A poor plan to arrest him once they figure some things out (well, after Anakin comes out and tells them). Putting Anakin and Palps together after they continue to say it's dangerous putting them together. Saying they are not soldiers, then conducting a war. Blaming the dark side for clouding everything. Not using common sense. Yoda failing against the Emperor. And it goes on and on. Their arrogance has blinded them as the wise Emperor said.