context: Two cars parked on the side of a street with seven people doing different tasks on the sidewalk.
hypothesis: We doubt that there are 2 cars on the street and people on the sidewalk.
valid_hypothesis: It is certain that there are 2 cars on the street and people on the sidewalk.
invalid_hypothesis: We doubt that there are 2 cars on the street and people on the sidewalk.
hypothesis_assertion: there are 2 cars on the street and people on the sidewalk.