context: It is probable that Julius is a rhino. It is probable that Greg is white. We doubt that Sandra got the apple.
hypothesis: Chances are about even that greg is white, and Julius is a rhino.
valid_hypothesis: Chances are about even that greg is white, and Julius is a rhino.
invalid_hypothesis: It is impossible that greg is white, and Julius is a rhino.
hypothesis_assertion: Greg is white, and Julius is a rhino.