context: It is probably not the case that Jeff went to the office. Chances are about even that Brian is a lion. There is a very good chance that Lily is white. Chances are about even that if Brian is a lion, or Lily is white, then Greg is green. We believe that if either Jeff went to the office, or Lily is white, then Mary dropped the milk. There is a very good chance that if Jeff went to the office, and Lily is white, then Julius is gray.
hypothesis: It is highly likely that jeff went to the office, or Lily is white.
valid_hypothesis: It is highly likely that jeff went to the office, or Lily is white.
invalid_hypothesis: We doubt that jeff went to the office, or Lily is white.
hypothesis_assertion: Jeff went to the office, or Lily is white.