context: There is almost no chance that Mary put down the apple. We believe that John went to the garden. There is a better than even chance that Lily is a swan. It is likely that if Mary put down the apple, or Lily is a swan, then Bill got the milk there. It is likely that if John went to the garden, and Mary put down the apple, then Daniel left the apple. There is almost no chance that if either Lily is a swan, or Mary put down the apple, then Brian is gray.
hypothesis: Chances are about even that either Bill got the milk there, or Mary put down the apple.
valid_hypothesis: Chances are about even that either Bill got the milk there, or Mary put down the apple.
invalid_hypothesis: There is almost no chance that either Bill got the milk there, or Mary put down the apple.
hypothesis_assertion: Either Bill got the milk there, or Mary put down the apple.