context: There is a better than even chance that Fred went to the garden. Chances are about even that Lily is a rhino. It is impossible that Greg is a lion.
hypothesis: It is probably not the case that lily is a rhino, and Fred went to the garden.
valid_hypothesis: It is probably not the case that lily is a rhino, and Fred went to the garden.
invalid_hypothesis: It is probably the case that lily is a rhino, and Fred went to the garden.
hypothesis_assertion: Lily is a rhino, and Fred went to the garden.