context: It is probably the case that Fred is in the park. There is a very good chance that Greg is white. It is almost certain that Lily is white. It is probable that if Greg is white, and Fred is in the park, then John picked up the apple. It is improbable that if either Greg is white, or Lily is white, then Bernhard is a frog. Chances are about even that if Lily is white, and Fred is in the park, then Bill went to the hallway.
hypothesis: Chances are about even that bernhard is a frog, and Greg is white.
valid_hypothesis: It is impossible that bernhard is a frog, and Greg is white.
invalid_hypothesis: Chances are about even that bernhard is a frog, and Greg is white.
hypothesis_assertion: Bernhard is a frog, and Greg is white.