context: A man is holding a book standing in front of a chalkboard.
hypothesis: It is almost certain that a man is holding a book about fossils, standing in front of a chalkboard.
valid_hypothesis: It is impossible that a man is holding a book about fossils, standing in front of a chalkboard.
invalid_hypothesis: It is almost certain that a man is holding a book about fossils, standing in front of a chalkboard.
hypothesis_assertion: A man is holding a book about fossils, standing in front of a chalkboard.