context: Chances are about even that Julius is a rhino. It is improbable that Greg is gray. It is likely that Mary moved to the garden.
hypothesis: It is highly unlikely that greg is gray, and Julius is a rhino.
valid_hypothesis: It is highly unlikely that greg is gray, and Julius is a rhino.
invalid_hypothesis: There is a very good chance that greg is gray, and Julius is a rhino.
hypothesis_assertion: Greg is gray, and Julius is a rhino.