context: Chances are slight that John put down the apple. It is probably not the case that Winona is a sheep. It is certain that Lily is green. We believe that if John put down the apple, or Winona is a sheep, then Julius is a rhino. Chances are slight that if either John put down the apple, or Winona is a sheep, then Mary left the apple. It is probable that if John put down the apple, and Winona is a sheep, then Bill dropped the milk.
hypothesis: It is highly likely that either John put down the apple, or Mary left the apple.
valid_hypothesis: It is improbable that either John put down the apple, or Mary left the apple.
invalid_hypothesis: It is highly likely that either John put down the apple, or Mary left the apple.
hypothesis_assertion: Either John put down the apple, or Mary left the apple.