context: It is almost certain that Greg is a lion. It is certain that Brian is a frog. We doubt that Bill moved to the garden.
hypothesis: It is almost certain that brian is a frog, and Greg is a lion.
valid_hypothesis: It is almost certain that brian is a frog, and Greg is a lion.
invalid_hypothesis: It is improbable that brian is a frog, and Greg is a lion.
hypothesis_assertion: Brian is a frog, and Greg is a lion.