context: A fireman with a neon helmet and a pickaxe inspects some debris with a flashlight.
hypothesis: It is impossible that a fireman with an axe stands in a burning house.
valid_hypothesis: It is impossible that a fireman with an axe stands in a burning house.
invalid_hypothesis: It is likely that a fireman with an axe stands in a burning house.
hypothesis_assertion: A fireman with an axe stands in a burning house.