context: It is highly likely that Sandra left the apple. It is improbable that John went to the garden. It is certain that Greg is yellow. It is impossible that if Greg is yellow, or John went to the garden, then Julius is white. We doubt that if Sandra left the apple, or John went to the garden, then Bernhard is a frog. It is impossible that if Sandra left the apple, and Greg is yellow, then Lily is green.
hypothesis: It is impossible that sandra left the apple, and Julius is white.
valid_hypothesis: It is impossible that sandra left the apple, and Julius is white.
invalid_hypothesis: Chances are about even that sandra left the apple, and Julius is white.
hypothesis_assertion: Sandra left the apple, and Julius is white.