context: It is probable that Brian is a frog. There is almost no chance that John left the milk. There is a very good chance that Gertrude is a mouse. It is highly unlikely that if Brian is a frog, and Gertrude is a mouse, then Jason is hungry. It is almost certain that if either Gertrude is a mouse, or John left the milk, then Lily is a swan. Chances are about even that if John left the milk, or Brian is a frog, then Bernhard is a lion.
hypothesis: There is a very good chance that gertrude is a mouse, or Lily is a swan.
valid_hypothesis: There is a very good chance that gertrude is a mouse, or Lily is a swan.
invalid_hypothesis: There is little chance that gertrude is a mouse, or Lily is a swan.
hypothesis_assertion: Gertrude is a mouse, or Lily is a swan.