context: A brown dog persues a Frisbee across the grass as the thrower watches.
hypothesis: It is improbable that a dog plays in the park with his owner on a sunny day.
valid_hypothesis: It is likely that a dog plays in the park with his owner on a sunny day.
invalid_hypothesis: It is improbable that a dog plays in the park with his owner on a sunny day.
hypothesis_assertion: A dog plays in the park with his owner on a sunny day.