context: There is little chance that Mary went to the school. Chances are slight that Greg is gray. We believe that Julius is a swan.
hypothesis: It is certain that mary went to the school, and Greg is gray.
valid_hypothesis: There is almost no chance that mary went to the school, and Greg is gray.
invalid_hypothesis: It is certain that mary went to the school, and Greg is gray.
hypothesis_assertion: Mary went to the school, and Greg is gray.