context: It is probable that John dropped the apple. It is probably not the case that Julius is a swan. It is almost certain that Bernhard is green. It is improbable that if Julius is a swan, or John dropped the apple, then Brian is a frog. Chances are slight that if either John dropped the apple, or Bernhard is green, then Mary went to the hallway. It is improbable that if John dropped the apple, or Julius is a swan, then Greg is a rhino.
hypothesis: It is improbable that either Brian is a frog, or Mary went to the hallway.
valid_hypothesis: It is improbable that either Brian is a frog, or Mary went to the hallway.
invalid_hypothesis: We believe that either Brian is a frog, or Mary went to the hallway.
hypothesis_assertion: Either Brian is a frog, or Mary went to the hallway.