context: It is probable that Daniel dropped the milk. It is likely that John moved to the office. There is little chance that Julius is a swan. Chances are slight that if Julius is a swan, and John moved to the office, then Sandra got the apple. It is likely that if Daniel dropped the milk, or Julius is a swan, then Lily is a frog. Chances are about even that if John moved to the office, or Daniel dropped the milk, then Bernhard is a rhino.
hypothesis: It is impossible that sandra got the apple, and Lily is a frog.
valid_hypothesis: It is impossible that sandra got the apple, and Lily is a frog.
invalid_hypothesis: It is probably the case that sandra got the apple, and Lily is a frog.
hypothesis_assertion: Sandra got the apple, and Lily is a frog.