context: There is a very good chance that Lily is a rhino. There is a better than even chance that Mary put down the milk. We doubt that Bernhard is a frog. It is almost certain that if Mary put down the milk, and Lily is a rhino, then John went to the hallway. Chances are slight that if either Mary put down the milk, or Bernhard is a frog, then Brian is green. It is improbable that if either Lily is a rhino, or Bernhard is a frog, then Julius is white.
hypothesis: It is certain that either John went to the hallway, or Julius is white.
valid_hypothesis: Chances are about even that either John went to the hallway, or Julius is white.
invalid_hypothesis: It is certain that either John went to the hallway, or Julius is white.
hypothesis_assertion: Either John went to the hallway, or Julius is white.