context: A person is climbing a wooden ladder on a very steep, jagged, rock cliff.
hypothesis: It is impossible that a man is climbing a ladder on a cliff in hopes of not falling to his death.
valid_hypothesis: We believe that a man is climbing a ladder on a cliff in hopes of not falling to his death.
invalid_hypothesis: It is impossible that a man is climbing a ladder on a cliff in hopes of not falling to his death.
hypothesis_assertion: A man is climbing a ladder on a cliff in hopes of not falling to his death.