context: It is likely that Mary went to the kitchen. It is probable that Sandra left the apple. Chances are about even that Julius is white. It is impossible that if either Julius is white, or Sandra left the apple, then Lily is green. It is impossible that if Julius is white, and Mary went to the kitchen, then Brian is a swan. It is probable that if Mary went to the kitchen, or Sandra left the apple, then Bernhard is green.
hypothesis: It is certain that either Lily is green, or Julius is white.
valid_hypothesis: Chances are about even that either Lily is green, or Julius is white.
invalid_hypothesis: It is certain that either Lily is green, or Julius is white.
hypothesis_assertion: Either Lily is green, or Julius is white.