http://i.imgur.com/r3yU0.png should do it for an INFO condition as pictured.
See that's how mine was set up, but I couldn't make it work for what I want. If I have to, I'll just check if the actors are dead in the script for the quest stage rather than the dialogue. In english I need:
If Actor 1 is dead, Actor 2 is alive, do the quest.
If Actor 1 is alive, Actor 2 is dead, do the quest.
If Actor 1 is dead and Actor 2 is dead, do something else. (I plan on adding a global for each of these scenarios in the quests, to flag as a condition so it doesn't get included in the Contracts list if there are no more members of their faction. That's who my objective is, anyone in the faction - SolitudeBlacksmith for example)
I'm trying IsDead and stuff but that's not working either lol.