context: We believe that Greg is a frog. It is unlikely that Mary dropped the milk. We doubt that Julius is a swan.
hypothesis: There is a very good chance that julius is a swan, or Greg is a frog.
valid_hypothesis: There is a very good chance that julius is a swan, or Greg is a frog.
invalid_hypothesis: There is little chance that julius is a swan, or Greg is a frog.
hypothesis_assertion: Julius is a swan, or Greg is a frog.