context: It is improbable that Fred is in the cinema. It is probably the case that Jeff went to the garden. Chances are slight that Brian is a frog.
hypothesis: We believe that jeff went to the garden, or Brian is a frog.
valid_hypothesis: We believe that jeff went to the garden, or Brian is a frog.
invalid_hypothesis: It is probably not the case that jeff went to the garden, or Brian is a frog.
hypothesis_assertion: Jeff went to the garden, or Brian is a frog.