context: It is probably not the case that Sandra left the apple. It is probably the case that Julius is a swan. It is certain that Brian is a rhino.
hypothesis: It is certain that brian is a rhino, or Sandra left the apple.
valid_hypothesis: It is certain that brian is a rhino, or Sandra left the apple.
invalid_hypothesis: It is impossible that brian is a rhino, or Sandra left the apple.
hypothesis_assertion: Brian is a rhino, or Sandra left the apple.