context: A group of people and a dog sitting on the steps.
hypothesis: It is impossible that a group of people and a dog are waiting for the plumber.
valid_hypothesis: It is impossible that a group of people and a dog are waiting for the plumber.
invalid_hypothesis: It is probably the case that a group of people and a dog are waiting for the plumber.
hypothesis_assertion: A group of people and a dog are waiting for the plumber.