context: There is a very good chance that Julius is white. It is probably the case that Brian is a swan. It is improbable that Lily is a frog. We believe that if Julius is white, and Brian is a swan, then John went to the office. It is almost certain that if either Lily is a frog, or Julius is white, then Mary moved to the garden. It is unlikely that if Julius is white, or Lily is a frog, then Sandra took the milk.
hypothesis: There is a better than even chance that either Sandra took the milk, or Julius is white.
valid_hypothesis: There is a better than even chance that either Sandra took the milk, or Julius is white.
invalid_hypothesis: There is almost no chance that either Sandra took the milk, or Julius is white.
hypothesis_assertion: Either Sandra took the milk, or Julius is white.