context: There is a very good chance that Mary left the apple. Chances are about even that Greg is a swan. It is probably the case that Gertrude is a cat. Chances are about even that if either Mary left the apple, or Gertrude is a cat, then Julius is green. It is highly unlikely that if Greg is a swan, or Mary left the apple, then Lily is a lion. It is unlikely that if Greg is a swan, or Mary left the apple, then Bill went to the kitchen.
hypothesis: We doubt that either Julius is green, or Mary left the apple.
valid_hypothesis: We believe that either Julius is green, or Mary left the apple.
invalid_hypothesis: We doubt that either Julius is green, or Mary left the apple.
hypothesis_assertion: Either Julius is green, or Mary left the apple.