context: There is almost no chance that Brian is a rhino. We doubt that Fred went to the garden. Chances are about even that John grabbed the apple.
hypothesis: It is probable that either Brian is a rhino, or Fred went to the garden.
valid_hypothesis: We doubt that either Brian is a rhino, or Fred went to the garden.
invalid_hypothesis: It is probable that either Brian is a rhino, or Fred went to the garden.
hypothesis_assertion: Either Brian is a rhino, or Fred went to the garden.