context: A guy singing on stage with a cool black shirt, while turning his microphone to the audience so they can sing along.
hypothesis: It is almost certain that a guy is singing a classic rock song on stage along with the audience.
valid_hypothesis: We doubt that a guy is singing a classic rock song on stage along with the audience.
invalid_hypothesis: It is almost certain that a guy is singing a classic rock song on stage along with the audience.
hypothesis_assertion: A guy is singing a classic rock song on stage along with the audience.