Ok, so I played 4 turns to let one AI settle an expo and then let one CS take both AI capitals and still got a Domination Win. Next thing to test is to trigger a domination win without my original capital, so I will take one capital, lose my capital to a CS and then take the last. L.E. I got one capital then lost my original capital and the let one cs capture the last capital and still got the dom victory, so you don't even require owning your original capital for domination victory. The truly crazy thing that happened is when I tried winning without any capital. So waited for both AIs to plant one expo, conquer 1 expo from an AI, then set up so that I would lose my capital and then the AIs will lose their capitals to city states in the same turn. First I lost my capital, then the first AI which got eliminated. Naturally this triggered a domination victory for the 2nd AI, but in that same turn the 2nd AI lost it's capital and this triggered a Domination Victory for me. I didn't even get the defeat screen for when AI #2 got it's Domination Win. I don't really know why I got a Domination victory at all, this is really crazy. I have attached some screenshots. I played as Genghis Khan, and the 2nd AI was Pocatello.