context: Chances are slight that John dropped the apple. It is probably the case that Bernhard is a lion. It is probably not the case that Sumit is bored. It is unlikely that if either Bernhard is a lion, or Sumit is bored, then Mary went to the office. There is a very good chance that if Sumit is bored, or Bernhard is a lion, then Brian is a rhino. It is probable that if Sumit is bored, and John dropped the apple, then Gertrude is a mouse.
hypothesis: There is a very good chance that either Gertrude is a mouse, or John dropped the apple.
valid_hypothesis: There is little chance that either Gertrude is a mouse, or John dropped the apple.
invalid_hypothesis: There is a very good chance that either Gertrude is a mouse, or John dropped the apple.
hypothesis_assertion: Either Gertrude is a mouse, or John dropped the apple.