context: Chances are slight that Bernhard is a frog. Chances are about even that Sandra grabbed the milk. It is highly likely that Winona is a mouse. Chances are slight that if Sandra grabbed the milk, or Winona is a mouse, then Brian is green. It is improbable that if Bernhard is a frog, and Sandra grabbed the milk, then Greg is gray. There is a very good chance that if either Sandra grabbed the milk, or Bernhard is a frog, then Lily is a swan.
hypothesis: It is highly unlikely that greg is gray, or Sandra grabbed the milk.
valid_hypothesis: Chances are about even that greg is gray, or Sandra grabbed the milk.
invalid_hypothesis: It is highly unlikely that greg is gray, or Sandra grabbed the milk.
hypothesis_assertion: Greg is gray, or Sandra grabbed the milk.