context: It is almost certain that John went to the garden. It is impossible that Brian is a frog. It is certain that Winona is a cat.
hypothesis: It is almost certain that winona is a cat, and John went to the garden.
valid_hypothesis: It is almost certain that winona is a cat, and John went to the garden.
invalid_hypothesis: We doubt that winona is a cat, and John went to the garden.
hypothesis_assertion: Winona is a cat, and John went to the garden.