context: There is almost no chance that Bill went to the bedroom. It is unlikely that Julius is a rhino. It is probably not the case that Jason is bored. It is probably not the case that if either Julius is a rhino, or Jason is bored, then Fred dropped the apple. It is highly unlikely that if Julius is a rhino, and Jason is bored, then Mary got the football. Chances are slight that if Bill went to the bedroom, and Julius is a rhino, then Brian is a lion.
hypothesis: It is almost certain that fred dropped the apple, and Mary got the football.
valid_hypothesis: It is impossible that fred dropped the apple, and Mary got the football.
invalid_hypothesis: It is almost certain that fred dropped the apple, and Mary got the football.
hypothesis_assertion: Fred dropped the apple, and Mary got the football.