context: It is likely that John dropped the apple. We doubt that Winona is a wolf. It is almost certain that Mary is in the garden. Chances are about even that if Mary is in the garden, or Winona is a wolf, then Greg is a frog. It is likely that if Winona is a wolf, and John dropped the apple, then Sandra left the football. Chances are slight that if Winona is a wolf, and Mary is in the garden, then Bernhard is white.
hypothesis: Chances are slight that sandra left the football, or John dropped the apple.
valid_hypothesis: It is probable that sandra left the football, or John dropped the apple.
invalid_hypothesis: Chances are slight that sandra left the football, or John dropped the apple.
hypothesis_assertion: Sandra left the football, or John dropped the apple.