I'm sorry if this has been asked before. I read in the book that defense from multiple sources does not stack. Does this mean that if you're wearing armor that gives you 1 defense, and you use advantage to gain +1 defense, that you still have 1 defense? Or is defense gained from advantage an exception because it is "+1" as opposed to "1"? For that matter, if you generate lost of advantage, can you get a +2 or theoretically even a +3 defense?
Also, can advantage generated from initiative be used to improve defense or add setback dice to opponents' actions? My thought is that this could be a way for characters to not get totally smoked if they fail initiative and don't get an opportunity to activate talents, take cover, or assume some other type of defense.