context: It is unlikely that Bernhard is a lion. Chances are slight that Sandra left the milk. Chances are about even that John dropped the apple. It is impossible that if either John dropped the apple, or Sandra left the milk, then Julius is yellow. It is probably not the case that if either Bernhard is a lion, or John dropped the apple, then Brian is green. There is a very good chance that if either Bernhard is a lion, or Sandra left the milk, then Greg is yellow.
hypothesis: It is impossible that julius is yellow, and Bernhard is a lion.
valid_hypothesis: It is impossible that julius is yellow, and Bernhard is a lion.
invalid_hypothesis: It is likely that julius is yellow, and Bernhard is a lion.
hypothesis_assertion: Julius is yellow, and Bernhard is a lion.