context: There is a better than even chance that Mary is in the garden. It is unlikely that Brian is a lion. It is probably not the case that Julius is a rhino.
hypothesis: It is certain that brian is a lion, or Julius is a rhino.
valid_hypothesis: Chances are about even that brian is a lion, or Julius is a rhino.
invalid_hypothesis: It is certain that brian is a lion, or Julius is a rhino.
hypothesis_assertion: Brian is a lion, or Julius is a rhino.