context: Chances are about even that Sandra grabbed the milk. It is probable that Lily is a frog. There is a very good chance that John moved to the garden. It is probable that if John moved to the garden, and Sandra grabbed the milk, then Greg is a swan. It is impossible that if either Sandra grabbed the milk, or Lily is a frog, then Mary went to the office. It is impossible that if John moved to the garden, or Sandra grabbed the milk, then Daniel took the apple.
hypothesis: There is a very good chance that either John moved to the garden, or Mary went to the office.
valid_hypothesis: There is a very good chance that either John moved to the garden, or Mary went to the office.
invalid_hypothesis: It is impossible that either John moved to the garden, or Mary went to the office.
hypothesis_assertion: Either John moved to the garden, or Mary went to the office.