context: It is probable that Greg is green. Chances are slight that John went to the hallway. Chances are about even that Julius is gray.
hypothesis: It is probably the case that julius is gray, and Greg is green.
valid_hypothesis: It is probably not the case that julius is gray, and Greg is green.
invalid_hypothesis: It is probably the case that julius is gray, and Greg is green.
hypothesis_assertion: Julius is gray, and Greg is green.