context: We believe that Lily is green. It is probably not the case that John went to the hallway. It is almost certain that Mary moved to the office. It is improbable that if either John went to the hallway, or Mary moved to the office, then Julius is gray. Chances are slight that if either Mary moved to the office, or Lily is green, then Brian is a lion. It is impossible that if John went to the hallway, or Lily is green, then Bill dropped the milk.
hypothesis: We believe that either John went to the hallway, or Mary moved to the office.
valid_hypothesis: We believe that either John went to the hallway, or Mary moved to the office.
invalid_hypothesis: It is probably not the case that either John went to the hallway, or Mary moved to the office.
hypothesis_assertion: Either John went to the hallway, or Mary moved to the office.