context: Chances are about even that John went to the garden. It is probable that Bernhard is a swan. It is probably not the case that Sandra got the football.
hypothesis: It is highly unlikely that sandra got the football, or John went to the garden.
valid_hypothesis: There is a better than even chance that sandra got the football, or John went to the garden.
invalid_hypothesis: It is highly unlikely that sandra got the football, or John went to the garden.
hypothesis_assertion: Sandra got the football, or John went to the garden.