context: Chances are slight that Lily is white. We doubt that Fred went to the bedroom. There is almost no chance that Mary dropped the milk. We doubt that if Lily is white, and Mary dropped the milk, then Sandra left the apple. It is probably not the case that if Fred went to the bedroom, or Mary dropped the milk, then Greg is a lion. It is probably the case that if Lily is white, and Fred went to the bedroom, then Julius is a swan.
hypothesis: It is probable that greg is a lion, and Sandra left the apple.
valid_hypothesis: It is impossible that greg is a lion, and Sandra left the apple.
invalid_hypothesis: It is probable that greg is a lion, and Sandra left the apple.
hypothesis_assertion: Greg is a lion, and Sandra left the apple.