context: It is probable that Brian is yellow. Chances are slight that Julius is white. Chances are slight that Greg is gray. Chances are slight that if Greg is gray, and Brian is yellow, then John got the milk. There is little chance that if either Greg is gray, or Julius is white, then Lily is a lion. It is improbable that if either Greg is gray, or Brian is yellow, then Mary moved to the garden.
hypothesis: Chances are about even that either Mary moved to the garden, or John got the milk.
valid_hypothesis: It is highly unlikely that either Mary moved to the garden, or John got the milk.
invalid_hypothesis: Chances are about even that either Mary moved to the garden, or John got the milk.
hypothesis_assertion: Either Mary moved to the garden, or John got the milk.