User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-4911512-20131023194527/@comment-11537809-20131024071257

Yes there are two question marks for both unstabe and feral. IIRC, the monster that is already shown to be in the quest (icon shown on quest info) is already guaranteed to be infected but I have no clue if this affects unstable monsters or not.