context: Chances are about even that Julius is a lion. We believe that Bernhard is white. Chances are slight that Greg is yellow.
hypothesis: It is likely that either Bernhard is white, or Greg is yellow.
valid_hypothesis: It is likely that either Bernhard is white, or Greg is yellow.
invalid_hypothesis: It is unlikely that either Bernhard is white, or Greg is yellow.
hypothesis_assertion: Either Bernhard is white, or Greg is yellow.