context: It is probably not the case that Daniel left the football. It is improbable that Bernhard is a rhino. Chances are slight that Brian is white. It is highly likely that if either Daniel left the football, or Brian is white, then Bill got the milk there. It is probably not the case that if either Brian is white, or Daniel left the football, then Greg is green. It is probable that if Bernhard is a rhino, and Brian is white, then Lily is a swan.
hypothesis: It is impossible that greg is green, and Lily is a swan.
valid_hypothesis: It is impossible that greg is green, and Lily is a swan.
invalid_hypothesis: It is probable that greg is green, and Lily is a swan.
hypothesis_assertion: Greg is green, and Lily is a swan.