context: We believe that Bernhard is a frog. It is probable that Sandra took the apple. It is impossible that Brian is a rhino. There is a better than even chance that if Sandra took the apple, and Bernhard is a frog, then Bill went to the garden. It is improbable that if either Brian is a rhino, or Bernhard is a frog, then Greg is gray. Chances are slight that if either Bernhard is a frog, or Sandra took the apple, then Mary dropped the apple.
hypothesis: It is impossible that brian is a rhino, and Bill went to the garden.
valid_hypothesis: It is impossible that brian is a rhino, and Bill went to the garden.
invalid_hypothesis: There is a better than even chance that brian is a rhino, and Bill went to the garden.
hypothesis_assertion: Brian is a rhino, and Bill went to the garden.