context: It is certain that Gertrude is a mouse. Chances are about even that Julius is gray. It is certain that Greg is a rhino.
hypothesis: It is certain that greg is a rhino, and Gertrude is a mouse.
valid_hypothesis: It is certain that greg is a rhino, and Gertrude is a mouse.
invalid_hypothesis: Chances are slight that greg is a rhino, and Gertrude is a mouse.
hypothesis_assertion: Greg is a rhino, and Gertrude is a mouse.