context: It is probably the case that Mary dropped the milk. It is impossible that Julius is a rhino. It is highly likely that Brian is a frog.
hypothesis: There is a very good chance that brian is a frog, and Julius is a rhino.
valid_hypothesis: It is impossible that brian is a frog, and Julius is a rhino.
invalid_hypothesis: There is a very good chance that brian is a frog, and Julius is a rhino.
hypothesis_assertion: Brian is a frog, and Julius is a rhino.