context: It is likely that Julius is a lion. It is highly unlikely that Brian is yellow. It is highly unlikely that Greg is white. Chances are about even that if either Julius is a lion, or Greg is white, then John went to the garden. There is little chance that if either Brian is yellow, or Greg is white, then Mary put down the milk. There is a very good chance that if either Julius is a lion, or Greg is white, then Bernhard is a rhino.
hypothesis: There is almost no chance that brian is yellow, and John went to the garden.
valid_hypothesis: There is almost no chance that brian is yellow, and John went to the garden.
invalid_hypothesis: There is a very good chance that brian is yellow, and John went to the garden.
hypothesis_assertion: Brian is yellow, and John went to the garden.