context: There is almost no chance that John moved to the office. Chances are about even that Greg is a rhino. It is certain that Brian is a lion. It is highly likely that if either Greg is a rhino, or Brian is a lion, then Lily is white. There is a very good chance that if Greg is a rhino, or Brian is a lion, then Yann got the milk there. It is probably not the case that if Greg is a rhino, and John moved to the office, then Mary went to the hallway.
hypothesis: It is highly unlikely that brian is a lion, or Yann got the milk there.
valid_hypothesis: It is certain that brian is a lion, or Yann got the milk there.
invalid_hypothesis: It is highly unlikely that brian is a lion, or Yann got the milk there.
hypothesis_assertion: Brian is a lion, or Yann got the milk there.