context: It is unlikely that Lily is a frog. We doubt that Mary dropped the milk. Chances are slight that John picked up the apple. Chances are about even that if Lily is a frog, or John picked up the apple, then Julie is in the bedroom. We doubt that if Lily is a frog, or John picked up the apple, then Greg is a lion. It is certain that if John picked up the apple, and Mary dropped the milk, then Bernhard is green.
hypothesis: It is certain that greg is a lion, or Lily is a frog.
valid_hypothesis: It is unlikely that greg is a lion, or Lily is a frog.
invalid_hypothesis: It is certain that greg is a lion, or Lily is a frog.
hypothesis_assertion: Greg is a lion, or Lily is a frog.