context: There is a better than even chance that Lily is a lion. There is a very good chance that Sandra got the apple. There is a better than even chance that John left the football. We believe that if either Sandra got the apple, or Lily is a lion, then Bill is in the kitchen. It is probable that if John left the football, or Lily is a lion, then Mary dropped the milk. There is little chance that if Lily is a lion, and John left the football, then Gertrude is a mouse.
hypothesis: Chances are about even that either Sandra got the apple, or Lily is a lion.
valid_hypothesis: Chances are about even that either Sandra got the apple, or Lily is a lion.
invalid_hypothesis: It is impossible that either Sandra got the apple, or Lily is a lion.
hypothesis_assertion: Either Sandra got the apple, or Lily is a lion.