context: A young girl in a pink coat erasing words on a chalkboard sign.
hypothesis: It is certain that a little girl is erasing her work for her teacher.
valid_hypothesis: Chances are about even that a little girl is erasing her work for her teacher.
invalid_hypothesis: It is certain that a little girl is erasing her work for her teacher.
hypothesis_assertion: A little girl is erasing her work for her teacher.