context: It is impossible that Fred is in the bedroom. It is unlikely that Greg is a frog. There is a better than even chance that Lily is green. It is unlikely that if either Greg is a frog, or Lily is green, then Julius is gray. It is highly likely that if Fred is in the bedroom, and Greg is a frog, then John went to the office. There is a very good chance that if Greg is a frog, or Fred is in the bedroom, then Mary moved to the garden.
hypothesis: It is impossible that greg is a frog, and John went to the office.
valid_hypothesis: It is impossible that greg is a frog, and John went to the office.
invalid_hypothesis: Chances are about even that greg is a frog, and John went to the office.
hypothesis_assertion: Greg is a frog, and John went to the office.