context: It is unlikely that Mary went to the bedroom. It is probably the case that Julius is yellow. Chances are slight that Daniel took the apple. It is unlikely that if either Daniel took the apple, or Mary went to the bedroom, then Brian is a rhino. It is highly unlikely that if either Daniel took the apple, or Mary went to the bedroom, then Lily is a lion. It is probably the case that if either Mary went to the bedroom, or Julius is yellow, then Fred left the milk.
hypothesis: It is impossible that either Fred left the milk, or Daniel took the apple.
valid_hypothesis: Chances are about even that either Fred left the milk, or Daniel took the apple.
invalid_hypothesis: It is impossible that either Fred left the milk, or Daniel took the apple.
hypothesis_assertion: Either Fred left the milk, or Daniel took the apple.