context: It is probably not the case that Mary picked up the milk. It is almost certain that Julius is a rhino. It is certain that Lily is a swan. There is almost no chance that if Julius is a rhino, and Mary picked up the milk, then Brian is a lion. It is likely that if Julius is a rhino, or Lily is a swan, then John moved to the office. There is a better than even chance that if Mary picked up the milk, and Lily is a swan, then Greg is yellow.
hypothesis: Chances are slight that greg is yellow, and Lily is a swan.
valid_hypothesis: Chances are slight that greg is yellow, and Lily is a swan.
invalid_hypothesis: It is almost certain that greg is yellow, and Lily is a swan.
hypothesis_assertion: Greg is yellow, and Lily is a swan.