context: We believe that Lily is a lion. Chances are slight that Mary moved to the garden. There is a very good chance that Sandra got the milk. There is a better than even chance that if Mary moved to the garden, or Sandra got the milk, then John went to the kitchen. There is a very good chance that if Sandra got the milk, and Lily is a lion, then Brian is a swan. It is highly unlikely that if Mary moved to the garden, or Lily is a lion, then Bernhard is green.
hypothesis: Chances are about even that either Mary moved to the garden, or John went to the kitchen.
valid_hypothesis: Chances are about even that either Mary moved to the garden, or John went to the kitchen.
invalid_hypothesis: It is almost certain that either Mary moved to the garden, or John went to the kitchen.
hypothesis_assertion: Either Mary moved to the garden, or John went to the kitchen.