context: A mountaineer about to descend down a mountain with a blue helmet on.
hypothesis: It is highly unlikely that a person starts to climb down the mountain before it gets too dark.
valid_hypothesis: There is a better than even chance that a person starts to climb down the mountain before it gets too dark.
invalid_hypothesis: It is highly unlikely that a person starts to climb down the mountain before it gets too dark.
hypothesis_assertion: A person starts to climb down the mountain before it gets too dark.