What is the logic behind who the AI plays cards against? Specifically the sanction and diplomacy cards. In a FFA game with one human and other AI, it is always played against the human? I tried checking the code, but ended up hurting my brain.

Thanks!

I think the AI is coded to target human players before they target other AI's

Thanks. I didn't know if this was always the case or if it had something to do with income (or perceived income), proximity, number of armies, random, etc.

Nope, the ai does not even consider whether it's target is human. It determines completely based on armies it sees on the map.