context: It is likely that Julius is a rhino. It is almost certain that Mary went to the garden. It is highly unlikely that Greg is green. We believe that if either Mary went to the garden, or Julius is a rhino, then Brian is a lion. Chances are about even that if either Greg is green, or Mary went to the garden, then Sandra got the milk. It is improbable that if either Mary went to the garden, or Greg is green, then Lily is a swan.
hypothesis: There is almost no chance that either Greg is green, or Julius is a rhino.
valid_hypothesis: It is probable that either Greg is green, or Julius is a rhino.
invalid_hypothesis: There is almost no chance that either Greg is green, or Julius is a rhino.
hypothesis_assertion: Either Greg is green, or Julius is a rhino.