context: A little girl in a gray jacket is riding her bicycle.
hypothesis: It is impossible that a little girl in a gray jacket is doing a wheelie on a ten speed mountain bike.
valid_hypothesis: It is impossible that a little girl in a gray jacket is doing a wheelie on a ten speed mountain bike.
invalid_hypothesis: It is almost certain that a little girl in a gray jacket is doing a wheelie on a ten speed mountain bike.
hypothesis_assertion: A little girl in a gray jacket is doing a wheelie on a ten speed mountain bike.