Jade is a natural earth resource. Just because Kai can create jade warriors doesn't mean he's connected to other jade objects in the franchise. I was jokingly pointing that out with my last remark.
But again, the citizens of the Valley made the palace. Plus, the palace sits on top of Jade Mountain, which is either named for looking like jade or for having a natural source of jade inside it. I'm inclined to think both is true.
That "warrant" is what logically connects the facts together, and then those connected facts create the logical "conclusion". Since you didn't have a warrant, nothing was connected and therefore the logic wasn't there - or at least supported.
Ah, no. That warrant doesn't connect Kai to the Jade Palace. The warrant needs to sensibly connect Facts 1 and 2. Adding an extra fact about Kai's other uses of jade also doesn't help.
What might be a good (and probably the only) warrant for the argument would be to say, "Kai was present during the construction of the Jade Palace," but that isn't fact. If I remember right, he was banished to the Spirit Realm before that happened.
I'm not sure I can explain this to you any better, so just forget about it. I was just trying to explain my thought process, but I can tell it's going over your head. :P
Like we saw in the movie the Pandas teach Oogway and show to Kai how to bring or restore life, but Kai find the way to take life or destroy life. So in some way, the Jade Zombies are only a design decision.
Because again Kai and Oogway were "Brothers in Arms" they fight together and came from the same Valley, so while Oogway made this Ying and Yang Staff with Jade elements, Kai make two daggers of Jade. So when the both of them died both of them get their weapons back in the Spirit Realm.
Only that Kai began using the daggers like a way to take or destroy life with the movements and emotions he knew and felt.
Kai was alredy death when the Jade Palace was build, because Oogway abandoned the army and begin teaching and learning Kung Fu in that palace. So yes Kai didnt build the palace, i dont believe it. It would have been a great storytelling device but sadly they didnt develop the story that way in the flashbacks.