context: Chances are slight that Greg is a swan. There is little chance that Mary went to the office. It is highly likely that John took the apple. It is probably not the case that if Greg is a swan, and Mary went to the office, then Julius is a lion. There is little chance that if Mary went to the office, and John took the apple, then Bernhard is gray. It is almost certain that if Greg is a swan, and Mary went to the office, then Gertrude is a mouse.
hypothesis: There is little chance that either John took the apple, or Gertrude is a mouse.
valid_hypothesis: It is highly likely that either John took the apple, or Gertrude is a mouse.
invalid_hypothesis: There is little chance that either John took the apple, or Gertrude is a mouse.
hypothesis_assertion: Either John took the apple, or Gertrude is a mouse.