context: Chances are slight that Mary is in the garden. There is almost no chance that Brian is a lion. It is probably not the case that Greg is green. It is highly unlikely that if Brian is a lion, or Mary is in the garden, then Antoine is hungry. It is certain that if Mary is in the garden, or Greg is green, then John went to the garden. It is unlikely that if Greg is green, or Brian is a lion, then Lily is yellow.
hypothesis: It is certain that either Mary is in the garden, or Greg is green.
valid_hypothesis: It is probably not the case that either Mary is in the garden, or Greg is green.
invalid_hypothesis: It is certain that either Mary is in the garden, or Greg is green.
hypothesis_assertion: Either Mary is in the garden, or Greg is green.