context: We believe that John picked up the apple. Chances are slight that Lily is a swan. We believe that Julius is gray. We believe that if Julius is gray, or Lily is a swan, then Jessica is a sheep. It is probably not the case that if Julius is gray, or John picked up the apple, then Brian is green. It is certain that if Lily is a swan, or Julius is gray, then Mary went to the garden.
hypothesis: We doubt that brian is green, and John picked up the apple.
valid_hypothesis: We doubt that brian is green, and John picked up the apple.
invalid_hypothesis: It is probably the case that brian is green, and John picked up the apple.
hypothesis_assertion: Brian is green, and John picked up the apple.