Since no one has brought it up, what about trimming the line “Dark science, cloning, secrets only the Sith knew.”
It’s so dumb considering there was an entire war named after clones with no direct relation to the Sith.
I don’t think that he’s saying ‘only the sith knew how to clone people’, I think he’s including that on a list of things. IE, Dark Science + Cloning + Secrets only the Sith knew, rather than as a descriptor.