context: It is highly likely that Brian is a rhino. There is almost no chance that Gertrude is a cat. We believe that Bernhard is a frog. There is a better than even chance that if Brian is a rhino, and Bernhard is a frog, then Julius is green. It is probably not the case that if Gertrude is a cat, and Brian is a rhino, then John left the apple. It is highly likely that if either Brian is a rhino, or Bernhard is a frog, then Jason is bored.
hypothesis: It is impossible that bernhard is a frog, and John left the apple.
valid_hypothesis: It is impossible that bernhard is a frog, and John left the apple.
invalid_hypothesis: There is a very good chance that bernhard is a frog, and John left the apple.
hypothesis_assertion: Bernhard is a frog, and John left the apple.