context: It is probably not the case that Mary went to the office. It is probably not the case that John picked up the milk. It is improbable that Lily is a rhino. We believe that if Mary went to the office, or John picked up the milk, then Fred left the football. It is impossible that if Mary went to the office, and Lily is a rhino, then Greg is a swan. It is improbable that if either John picked up the milk, or Lily is a rhino, then Brian is gray.
hypothesis: There is a very good chance that john picked up the milk, and Mary went to the office.
valid_hypothesis: It is highly unlikely that john picked up the milk, and Mary went to the office.
invalid_hypothesis: There is a very good chance that john picked up the milk, and Mary went to the office.
hypothesis_assertion: John picked up the milk, and Mary went to the office.