context: Chances are slight that Lily is a swan. Chances are slight that John left the football. There is a better than even chance that Bernhard is white. It is probably not the case that if John left the football, or Bernhard is white, then Mary went to the hallway. Chances are slight that if either Lily is a swan, or Bernhard is white, then Winona is a wolf. We doubt that if Lily is a swan, and Bernhard is white, then Julius is a rhino.
hypothesis: There is a very good chance that either John left the football, or Julius is a rhino.
valid_hypothesis: There is little chance that either John left the football, or Julius is a rhino.
invalid_hypothesis: There is a very good chance that either John left the football, or Julius is a rhino.
hypothesis_assertion: Either John left the football, or Julius is a rhino.