context: Chances are about even that Brian is a rhino. Chances are slight that John got the apple. It is probably not the case that Bernhard is gray. There is a better than even chance that if Bernhard is gray, and Brian is a rhino, then Lily is a frog. It is likely that if either John got the apple, or Bernhard is gray, then Greg is a frog. It is certain that if John got the apple, and Brian is a rhino, then Mary went to the kitchen.
hypothesis: It is probably not the case that greg is a frog, or Lily is a frog.
valid_hypothesis: It is probably not the case that greg is a frog, or Lily is a frog.
invalid_hypothesis: It is certain that greg is a frog, or Lily is a frog.
hypothesis_assertion: Greg is a frog, or Lily is a frog.