context: It is unlikely that Julius is a lion. Chances are about even that Sandra left the apple. There is a very good chance that Mary moved to the garden. It is improbable that if either Julius is a lion, or Sandra left the apple, then Bernhard is a rhino. We believe that if either Sandra left the apple, or Mary moved to the garden, then Brian is yellow. It is certain that if Julius is a lion, and Mary moved to the garden, then Bill went to the office.
hypothesis: It is unlikely that either Brian is yellow, or Sandra left the apple.
valid_hypothesis: We believe that either Brian is yellow, or Sandra left the apple.
invalid_hypothesis: It is unlikely that either Brian is yellow, or Sandra left the apple.
hypothesis_assertion: Either Brian is yellow, or Sandra left the apple.