context: We doubt that Lily is a frog. There is little chance that John went to the kitchen. It is probable that Julius is a lion. There is a better than even chance that if Julius is a lion, and Lily is a frog, then Brian is a swan. It is likely that if either Julius is a lion, or Lily is a frog, then Mary left the milk. It is almost certain that if John went to the kitchen, and Julius is a lion, then Bernhard is green.
hypothesis: It is probable that julius is a lion, and Lily is a frog.
valid_hypothesis: Chances are slight that julius is a lion, and Lily is a frog.
invalid_hypothesis: It is probable that julius is a lion, and Lily is a frog.
hypothesis_assertion: Julius is a lion, and Lily is a frog.