context: It is highly unlikely that Lily is a rhino. It is improbable that Fred left the football. There is little chance that Sandra got the milk. There is a very good chance that if Fred left the football, or Lily is a rhino, then Mary went to the hallway. It is probably not the case that if Lily is a rhino, and Sandra got the milk, then Brian is green. It is probable that if Fred left the football, and Sandra got the milk, then Jessica is a wolf.
hypothesis: It is impossible that sandra got the milk, and Jessica is a wolf.
valid_hypothesis: It is impossible that sandra got the milk, and Jessica is a wolf.
invalid_hypothesis: Chances are about even that sandra got the milk, and Jessica is a wolf.
hypothesis_assertion: Sandra got the milk, and Jessica is a wolf.