context: It is unlikely that Bill is in the school. There is a better than even chance that John got the apple. Chances are slight that Greg is a lion.
hypothesis: There is almost no chance that bill is in the school, and Greg is a lion.
valid_hypothesis: There is almost no chance that bill is in the school, and Greg is a lion.
invalid_hypothesis: There is a better than even chance that bill is in the school, and Greg is a lion.
hypothesis_assertion: Bill is in the school, and Greg is a lion.