context: It is impossible that Sandra left the apple. It is unlikely that Fred went to the garden. Chances are about even that Mary moved to the garden.
hypothesis: There is a better than even chance that fred went to the garden, or Mary moved to the garden.
valid_hypothesis: There is a better than even chance that fred went to the garden, or Mary moved to the garden.
invalid_hypothesis: There is almost no chance that fred went to the garden, or Mary moved to the garden.
hypothesis_assertion: Fred went to the garden, or Mary moved to the garden.