context: It is almost certain that Greg is a lion. It is certain that Mary dropped the milk. There is a very good chance that Julius is a swan. It is impossible that if either Mary dropped the milk, or Greg is a lion, then John is in the hallway. We believe that if Julius is a swan, or Mary dropped the milk, then Brian is a frog. It is improbable that if either Mary dropped the milk, or Greg is a lion, then Bernhard is yellow.
hypothesis: There is a very good chance that either Mary dropped the milk, or Brian is a frog.
valid_hypothesis: It is probably not the case that either Mary dropped the milk, or Brian is a frog.
invalid_hypothesis: There is a very good chance that either Mary dropped the milk, or Brian is a frog.
hypothesis_assertion: Either Mary dropped the milk, or Brian is a frog.