context: It is impossible that Brian is a frog. It is almost certain that Julius is a frog. We believe that Lily is gray.
hypothesis: It is probably the case that lily is gray, and Brian is a frog.
valid_hypothesis: It is impossible that lily is gray, and Brian is a frog.
invalid_hypothesis: It is probably the case that lily is gray, and Brian is a frog.
hypothesis_assertion: Lily is gray, and Brian is a frog.