context: It is improbable that John dropped the apple. It is probably the case that Bernhard is a lion. There is little chance that Lily is white. It is improbable that if Lily is white, or John dropped the apple, then Sandra got the milk. It is probably not the case that if either Lily is white, or John dropped the apple, then Mary moved to the garden. It is highly unlikely that if Bernhard is a lion, and Lily is white, then Greg is a swan.
hypothesis: It is impossible that greg is a swan, and Bernhard is a lion.
valid_hypothesis: It is impossible that greg is a swan, and Bernhard is a lion.
invalid_hypothesis: It is certain that greg is a swan, and Bernhard is a lion.
hypothesis_assertion: Greg is a swan, and Bernhard is a lion.