context: Chances are slight that Greg is a swan. It is probably the case that Lily is white. We believe that Mary is in the garden. It is highly unlikely that if Mary is in the garden, and Greg is a swan, then Bernhard is gray. We doubt that if Lily is white, or Greg is a swan, then John went to the office. It is improbable that if Greg is a swan, and Lily is white, then Brian is a lion.
hypothesis: It is almost certain that greg is a swan, or John went to the office.
valid_hypothesis: It is probably not the case that greg is a swan, or John went to the office.
invalid_hypothesis: It is almost certain that greg is a swan, or John went to the office.
hypothesis_assertion: Greg is a swan, or John went to the office.