context: It is highly unlikely that Julius is yellow. There is a better than even chance that Mary went to the hallway. It is unlikely that Bernhard is a frog. It is improbable that if Mary went to the hallway, and Bernhard is a frog, then Greg is a lion. It is probably the case that if Mary went to the hallway, or Bernhard is a frog, then John got the football. It is probably not the case that if Mary went to the hallway, or Bernhard is a frog, then Brian is gray.
hypothesis: There is a better than even chance that either Greg is a lion, or Mary went to the hallway.
valid_hypothesis: There is a better than even chance that either Greg is a lion, or Mary went to the hallway.
invalid_hypothesis: There is almost no chance that either Greg is a lion, or Mary went to the hallway.
hypothesis_assertion: Either Greg is a lion, or Mary went to the hallway.