context: There is little chance that Greg is a swan. It is probably the case that Brian is a lion. It is unlikely that Julius is a rhino.
hypothesis: We believe that greg is a swan, or Brian is a lion.
valid_hypothesis: We believe that greg is a swan, or Brian is a lion.
invalid_hypothesis: It is improbable that greg is a swan, or Brian is a lion.
hypothesis_assertion: Greg is a swan, or Brian is a lion.