context: There is a better than even chance that Lily is a rhino. Chances are slight that Mary went to the garden. We doubt that Daniel took the football. There is a better than even chance that if Lily is a rhino, or Mary went to the garden, then Julius is a lion. It is impossible that if either Mary went to the garden, or Lily is a rhino, then Fred moved to the office. Chances are about even that if Lily is a rhino, or Daniel took the football, then Brian is gray.
hypothesis: It is probably not the case that either Brian is gray, or Fred moved to the office.
valid_hypothesis: It is probably not the case that either Brian is gray, or Fred moved to the office.
invalid_hypothesis: There is a very good chance that either Brian is gray, or Fred moved to the office.
hypothesis_assertion: Either Brian is gray, or Fred moved to the office.