context: Chances are about even that Mary left the football. There is almost no chance that Fred went to the garden. Chances are slight that Brian is gray.
hypothesis: We believe that either Fred went to the garden, or Brian is gray.
valid_hypothesis: There is little chance that either Fred went to the garden, or Brian is gray.
invalid_hypothesis: We believe that either Fred went to the garden, or Brian is gray.
hypothesis_assertion: Either Fred went to the garden, or Brian is gray.