context: A woman walking down a crowded sidewalk talking on her cellphone.
hypothesis: Chances are slight that a woman is talking on her phone and walking down a sidewalk.
valid_hypothesis: It is certain that a woman is talking on her phone and walking down a sidewalk.
invalid_hypothesis: Chances are slight that a woman is talking on her phone and walking down a sidewalk.
hypothesis_assertion: A woman is talking on her phone and walking down a sidewalk.