context: It is unlikely that Greg is gray. It is highly likely that Brian is gray. It is certain that John went to the garden. It is probable that if either John went to the garden, or Greg is gray, then Sandra grabbed the milk. There is little chance that if either John went to the garden, or Greg is gray, then Daniel is in the garden. There is almost no chance that if either Greg is gray, or John went to the garden, then Julius is white.
hypothesis: Chances are about even that either Brian is gray, or Sandra grabbed the milk.
valid_hypothesis: Chances are about even that either Brian is gray, or Sandra grabbed the milk.
invalid_hypothesis: There is almost no chance that either Brian is gray, or Sandra grabbed the milk.
hypothesis_assertion: Either Brian is gray, or Sandra grabbed the milk.