context: It is probable that Mary dropped the apple. It is probably the case that Julius is a lion. It is impossible that Greg is a swan. There is almost no chance that if Mary dropped the apple, or Julius is a lion, then John went to the garden. There is little chance that if Julius is a lion, and Greg is a swan, then Sandra took the football. We believe that if either Julius is a lion, or Greg is a swan, then Lily is white.
hypothesis: We believe that sandra took the football, and Lily is white.
valid_hypothesis: It is impossible that sandra took the football, and Lily is white.
invalid_hypothesis: We believe that sandra took the football, and Lily is white.
hypothesis_assertion: Sandra took the football, and Lily is white.