How much did Mas Amedda know? Just how much did the Vice Chair know about Supreme Chancellor Palpatine's true nature. He seems to aid Darth Sidious's cause in TPM, when he obstructs Valorum and keeps him from taking action against the Trade Federation. He helps Palpatine more directly in AOTC, where he insists that the Senate give Palpatine emergency powers and approve the creation of an army, which sets off the Clone Wars. In ROTS, Amedda witnesses Yoda enter Palpatine's office and call him Darth Sidious. He then sees Palpatine blast Yoda across the office with Force Lightning. After the duel concludes, Amedda declares that Yoda is not dead if the clones couldn't find a body. He addresses Palpatine as Master in that scene. Not Emperor, or Your Majesty, as the clones do. But Master, the way Palpatine's apprentices address him. So did Mas Amedda know that Palpatine was a Sith from the beginning? Or did it take Yoda's "Should I call you Darth Sidious" and the Force Lightning for Mas Amedda to realize that Palpatine was far more than a mere politician who had risen beyond his office.