context: It is likely that Julius is gray. It is probable that Lily is gray. It is probable that Greg is a swan. Chances are slight that if Lily is gray, and Julius is gray, then Fred is in the office. Chances are about even that if Lily is gray, and Julius is gray, then Emily is a sheep. There is little chance that if Julius is gray, and Greg is a swan, then Bernhard is a frog.
hypothesis: It is likely that either Fred is in the office, or Bernhard is a frog.
valid_hypothesis: Chances are slight that either Fred is in the office, or Bernhard is a frog.
invalid_hypothesis: It is likely that either Fred is in the office, or Bernhard is a frog.
hypothesis_assertion: Either Fred is in the office, or Bernhard is a frog.