context: An elderly saxophonist performing at an outdoor event.
hypothesis: It is impossible that a world reknown musician performs his last performance at and outdoor music festival.
valid_hypothesis: It is impossible that a world reknown musician performs his last performance at and outdoor music festival.
invalid_hypothesis: It is likely that a world reknown musician performs his last performance at and outdoor music festival.
hypothesis_assertion: A world reknown musician performs his last performance at and outdoor music festival.