context: It is impossible that Julius is a frog. There is a very good chance that Bernhard is green. It is improbable that Mary went to the hallway. It is probably the case that if either Julius is a frog, or Bernhard is green, then Brian is white. It is almost certain that if Bernhard is green, and Mary went to the hallway, then Sandra got the football. Chances are about even that if Mary went to the hallway, and Bernhard is green, then Greg is a rhino.
hypothesis: It is highly unlikely that either Greg is a rhino, or Mary went to the hallway.
valid_hypothesis: It is highly unlikely that either Greg is a rhino, or Mary went to the hallway.
invalid_hypothesis: It is probable that either Greg is a rhino, or Mary went to the hallway.
hypothesis_assertion: Either Greg is a rhino, or Mary went to the hallway.