context: It is improbable that Lily is a lion. There is a better than even chance that John moved to the garden. It is certain that Sandra took the milk. Chances are slight that if either John moved to the garden, or Sandra took the milk, then Brian is a rhino. We believe that if either Lily is a lion, or Sandra took the milk, then Daniel got the apple. It is almost certain that if either John moved to the garden, or Sandra took the milk, then Greg is a swan.
hypothesis: It is highly unlikely that greg is a swan, and Brian is a rhino.
valid_hypothesis: It is highly unlikely that greg is a swan, and Brian is a rhino.
invalid_hypothesis: It is highly likely that greg is a swan, and Brian is a rhino.
hypothesis_assertion: Greg is a swan, and Brian is a rhino.