context: There is a better than even chance that Greg is a swan. It is highly unlikely that Lily is a frog. We believe that Bernhard is a lion. It is probably the case that if either Bernhard is a lion, or Lily is a frog, then Jessica is a cat. It is unlikely that if either Bernhard is a lion, or Lily is a frog, then John picked up the milk. There is a very good chance that if either Lily is a frog, or Bernhard is a lion, then Jeff went to the garden.
hypothesis: There is almost no chance that greg is a swan, and Lily is a frog.
valid_hypothesis: There is almost no chance that greg is a swan, and Lily is a frog.
invalid_hypothesis: We believe that greg is a swan, and Lily is a frog.
hypothesis_assertion: Greg is a swan, and Lily is a frog.