context: There is almost no chance that Brian is a frog. It is highly likely that Greg is a rhino. Chances are slight that Lily is a lion. It is probably the case that if either Brian is a frog, or Greg is a rhino, then Bernhard is yellow. It is highly unlikely that if Greg is a rhino, and Brian is a frog, then Sandra left the apple. We believe that if either Lily is a lion, or Brian is a frog, then Fred is in the school.
hypothesis: We believe that either Bernhard is yellow, or Greg is a rhino.
valid_hypothesis: It is probably not the case that either Bernhard is yellow, or Greg is a rhino.
invalid_hypothesis: We believe that either Bernhard is yellow, or Greg is a rhino.
hypothesis_assertion: Either Bernhard is yellow, or Greg is a rhino.