context: A boy in swimming trunks wades out into the water.
hypothesis: It is likely that the young swimmer wades out into the water at the start of his team practice.
valid_hypothesis: It is impossible that the young swimmer wades out into the water at the start of his team practice.
invalid_hypothesis: It is likely that the young swimmer wades out into the water at the start of his team practice.
hypothesis_assertion: The young swimmer wades out into the water at the start of his team practice.