context: It is highly unlikely that Mary went to the garden. There is almost no chance that Bill dropped the milk. It is probably the case that Brian is green. Chances are about even that if Mary went to the garden, and Bill dropped the milk, then Julius is a lion. We believe that if Brian is green, or Mary went to the garden, then Lily is a rhino. It is probably not the case that if either Mary went to the garden, or Brian is green, then Greg is a lion.
hypothesis: It is probable that brian is green, or Mary went to the garden.
valid_hypothesis: It is probable that brian is green, or Mary went to the garden.
invalid_hypothesis: There is almost no chance that brian is green, or Mary went to the garden.
hypothesis_assertion: Brian is green, or Mary went to the garden.