context: Chances are about even that John went to the garden. There is a very good chance that Lily is a frog. It is almost certain that Sandra grabbed the milk. Chances are about even that if Lily is a frog, and John went to the garden, then Julie is in the office. There is a better than even chance that if John went to the garden, or Lily is a frog, then Bernhard is a swan. There is little chance that if either John went to the garden, or Sandra grabbed the milk, then Greg is green.
hypothesis: There is almost no chance that either John went to the garden, or Greg is green.
valid_hypothesis: Chances are about even that either John went to the garden, or Greg is green.
invalid_hypothesis: There is almost no chance that either John went to the garden, or Greg is green.
hypothesis_assertion: Either John went to the garden, or Greg is green.