context: Chances are slight that Fred is in the kitchen. It is impossible that Greg is green. It is unlikely that Mary went to the garden. It is highly likely that if Fred is in the kitchen, and Greg is green, then Lily is a rhino. It is improbable that if Greg is green, and Mary went to the garden, then Brian is a lion. It is likely that if Mary went to the garden, or Fred is in the kitchen, then John got the apple.
hypothesis: It is highly unlikely that fred is in the kitchen, and John got the apple.
valid_hypothesis: It is highly unlikely that fred is in the kitchen, and John got the apple.
invalid_hypothesis: It is certain that fred is in the kitchen, and John got the apple.
hypothesis_assertion: Fred is in the kitchen, and John got the apple.