context: It is almost certain that Brian is a swan. It is probably not the case that Lily is a frog. There is little chance that Fred went to the garden.
hypothesis: It is almost certain that fred went to the garden, or Brian is a swan.
valid_hypothesis: It is almost certain that fred went to the garden, or Brian is a swan.
invalid_hypothesis: It is unlikely that fred went to the garden, or Brian is a swan.
hypothesis_assertion: Fred went to the garden, or Brian is a swan.