context: It is probably the case that Greg is a swan. It is highly likely that Lily is green. There is little chance that Bill went to the office. There is almost no chance that if Lily is green, or Bill went to the office, then Brian is gray. It is probably the case that if Bill went to the office, or Greg is a swan, then Mary grabbed the milk. Chances are slight that if Bill went to the office, or Lily is green, then Gertrude is a mouse.
hypothesis: We believe that greg is a swan, or Bill went to the office.
valid_hypothesis: We believe that greg is a swan, or Bill went to the office.
invalid_hypothesis: It is probably not the case that greg is a swan, or Bill went to the office.
hypothesis_assertion: Greg is a swan, or Bill went to the office.