context: It is probable that John went to the hallway. Chances are slight that Mary left the apple. It is probably the case that Lily is gray. We doubt that if either John went to the hallway, or Lily is gray, then Greg is a frog. It is certain that if John went to the hallway, or Lily is gray, then Brian is a swan. It is likely that if John went to the hallway, and Lily is gray, then Julius is yellow.
hypothesis: There is a very good chance that greg is a frog, or Mary left the apple.
valid_hypothesis: We doubt that greg is a frog, or Mary left the apple.
invalid_hypothesis: There is a very good chance that greg is a frog, or Mary left the apple.
hypothesis_assertion: Greg is a frog, or Mary left the apple.