context: It is probably the case that Lily is white. It is probable that John went to the garden. It is impossible that Mary dropped the apple. It is unlikely that if either Lily is white, or John went to the garden, then Sandra took the football. Chances are slight that if John went to the garden, or Lily is white, then Julius is a swan. There is little chance that if Lily is white, and John went to the garden, then Bernhard is gray.
hypothesis: Chances are about even that sandra took the football, and Julius is a swan.
valid_hypothesis: It is impossible that sandra took the football, and Julius is a swan.
invalid_hypothesis: Chances are about even that sandra took the football, and Julius is a swan.
hypothesis_assertion: Sandra took the football, and Julius is a swan.