Several plot cards start with... "Exhaust this card during the setup of the first encounter."
Most quests have two encounters. Some have only one encounter. I read that as being valid for single encounter quests as well as two encounter quests. Afterall, "first" is still true even if there is only one. I played the above card for a single encounter quest. One of my Hero players then played the "You cannot!" card because he claims that if it says "first encounter", it implies first of two encounters, therefore it cannot be used for single encounter quests. I said I would ask the Forum.
Your thoughts? Valid for single encounter quests or not?