context: It is highly likely that Brian is gray. It is impossible that Bernhard is yellow. It is probably the case that Jeff went to the kitchen. It is likely that if Bernhard is yellow, and Jeff went to the kitchen, then Jessica is a mouse. It is highly unlikely that if either Brian is gray, or Bernhard is yellow, then John moved to the garden. It is likely that if either Bernhard is yellow, or Brian is gray, then Sandra left the football.
hypothesis: It is impossible that either Jeff went to the kitchen, or Sandra left the football.
valid_hypothesis: Chances are about even that either Jeff went to the kitchen, or Sandra left the football.
invalid_hypothesis: It is impossible that either Jeff went to the kitchen, or Sandra left the football.
hypothesis_assertion: Either Jeff went to the kitchen, or Sandra left the football.