context: It is almost certain that Greg is a lion. It is improbable that Brian is a frog. It is unlikely that Fred is in the bedroom. Chances are about even that if Greg is a lion, or Brian is a frog, then Bernhard is a lion. It is likely that if either Greg is a lion, or Brian is a frog, then Bill went to the hallway. We doubt that if either Greg is a lion, or Brian is a frog, then John moved to the garden.
hypothesis: It is improbable that brian is a frog, or Greg is a lion.
valid_hypothesis: It is almost certain that brian is a frog, or Greg is a lion.
invalid_hypothesis: It is improbable that brian is a frog, or Greg is a lion.
hypothesis_assertion: Brian is a frog, or Greg is a lion.