context: It is highly unlikely that Bill went to the cinema. There is a very good chance that Bernhard is a lion. There is almost no chance that Julius is white. There is little chance that if either Bill went to the cinema, or Bernhard is a lion, then Mary got the football. We believe that if Julius is white, or Bernhard is a lion, then Greg is a frog. Chances are about even that if Bill went to the cinema, and Bernhard is a lion, then John took the apple.
hypothesis: It is impossible that mary got the football, and John took the apple.
valid_hypothesis: It is impossible that mary got the football, and John took the apple.
invalid_hypothesis: It is certain that mary got the football, and John took the apple.
hypothesis_assertion: Mary got the football, and John took the apple.