context: Chances are slight that Greg is green. It is probably the case that Mary picked up the milk. It is improbable that Fred went to the hallway. It is impossible that if either Fred went to the hallway, or Greg is green, then Brian is a lion. We doubt that if Mary picked up the milk, or Fred went to the hallway, then Lily is white. It is probably the case that if Greg is green, and Fred went to the hallway, then Julius is a rhino.
hypothesis: It is highly unlikely that greg is green, and Mary picked up the milk.
valid_hypothesis: It is highly unlikely that greg is green, and Mary picked up the milk.
invalid_hypothesis: There is a better than even chance that greg is green, and Mary picked up the milk.
hypothesis_assertion: Greg is green, and Mary picked up the milk.