context: It is highly likely that Gertrude is a sheep. It is probably the case that John went to the garden. We believe that Mary moved to the office. It is improbable that if either Gertrude is a sheep, or John went to the garden, then Julius is a swan. It is probably not the case that if John went to the garden, or Mary moved to the office, then Greg is a lion. It is improbable that if either John went to the garden, or Gertrude is a sheep, then Daniel left the milk.
hypothesis: It is probably not the case that either Greg is a lion, or Julius is a swan.
valid_hypothesis: It is probably not the case that either Greg is a lion, or Julius is a swan.
invalid_hypothesis: It is probable that either Greg is a lion, or Julius is a swan.
hypothesis_assertion: Either Greg is a lion, or Julius is a swan.