context: We believe that Mary discarded the apple. There is little chance that Bernhard is gray. It is improbable that Lily is a frog. It is unlikely that if either Mary discarded the apple, or Bernhard is gray, then Julius is white. It is unlikely that if Mary discarded the apple, and Lily is a frog, then John went to the garden. We doubt that if Bernhard is gray, or Lily is a frog, then Greg is gray.
hypothesis: It is probable that lily is a frog, and Greg is gray.
valid_hypothesis: There is almost no chance that lily is a frog, and Greg is gray.
invalid_hypothesis: It is probable that lily is a frog, and Greg is gray.
hypothesis_assertion: Lily is a frog, and Greg is gray.