context: Chances are about even that Mary is in the school. It is likely that Brian is a frog. Chances are about even that Julius is a swan. It is probably the case that if Julius is a swan, or Mary is in the school, then Bernhard is yellow. It is certain that if Mary is in the school, and Julius is a swan, then John went to the hallway. It is probably the case that if Brian is a frog, or Mary is in the school, then Sandra took the football.
hypothesis: It is impossible that mary is in the school, or Bernhard is yellow.
valid_hypothesis: It is likely that mary is in the school, or Bernhard is yellow.
invalid_hypothesis: It is impossible that mary is in the school, or Bernhard is yellow.
hypothesis_assertion: Mary is in the school, or Bernhard is yellow.