In Darth Plagueis, Dooku reveals a lot to Senator Palpatine while he's still a Jedi Master. He makes a lot of pointed comments about the Sith and admits that he wants to learn the secrets of the Dark side of the Force. Following Palpatine's election, he and the new Chancellor have another chat, where Dooku admits that he wants to find the second Sith Lord. But instead of killing him, he wants to make an alliance and work together to rebuild the Republic from the ground up. So how long did Dooku know or suspect Palpatine to be what he was. Did Dooku also know that Hego Damask was a Sith Lord? Also, Dooku seems to be predisposed to turn to the Dark side, if he had never met Palpatine, would he still have joined the Dark side?