context: It is highly unlikely that Greg is a rhino. Chances are slight that John got the milk. It is probably not the case that Mary left the apple. Chances are about even that if Mary left the apple, or Greg is a rhino, then Julius is a swan. It is certain that if John got the milk, and Mary left the apple, then Bernhard is a frog. We believe that if Mary left the apple, and John got the milk, then Lily is green.
hypothesis: There is almost no chance that mary left the apple, and Lily is green.
valid_hypothesis: There is almost no chance that mary left the apple, and Lily is green.
invalid_hypothesis: It is almost certain that mary left the apple, and Lily is green.
hypothesis_assertion: Mary left the apple, and Lily is green.