context: There is a better than even chance that Sandra got the apple. It is unlikely that Brian is a lion. There is a better than even chance that Yann is tired. There is a very good chance that if either Yann is tired, or Sandra got the apple, then Lily is a frog. It is likely that if Sandra got the apple, or Brian is a lion, then Bernhard is a rhino. We believe that if either Sandra got the apple, or Yann is tired, then Mary moved to the garden.
hypothesis: Chances are about even that brian is a lion, or Lily is a frog.
valid_hypothesis: Chances are about even that brian is a lion, or Lily is a frog.
invalid_hypothesis: It is certain that brian is a lion, or Lily is a frog.
hypothesis_assertion: Brian is a lion, or Lily is a frog.