context: It is probable that Bernhard is a swan. It is almost certain that Mary took the apple. There is almost no chance that Lily is a rhino. It is improbable that if either Lily is a rhino, or Bernhard is a swan, then Greg is a lion. We believe that if either Lily is a rhino, or Bernhard is a swan, then John went to the bedroom. We doubt that if either Bernhard is a swan, or Mary took the apple, then Brian is green.
hypothesis: It is impossible that greg is a lion, and Lily is a rhino.
valid_hypothesis: It is impossible that greg is a lion, and Lily is a rhino.
invalid_hypothesis: It is probably the case that greg is a lion, and Lily is a rhino.
hypothesis_assertion: Greg is a lion, and Lily is a rhino.