context: It is probable that Greg is green. It is probable that John went to the hallway. We doubt that Julius is a lion.
hypothesis: It is certain that greg is green, and John went to the hallway.
valid_hypothesis: Chances are about even that greg is green, and John went to the hallway.
invalid_hypothesis: It is certain that greg is green, and John went to the hallway.
hypothesis_assertion: Greg is green, and John went to the hallway.