context: A brown dog is trying to retrive his orange ball that has fallen in a dirt hole.
hypothesis: There is almost no chance that a dog is trying to get a ball back for his master.
valid_hypothesis: There is a better than even chance that a dog is trying to get a ball back for his master.
invalid_hypothesis: There is almost no chance that a dog is trying to get a ball back for his master.
hypothesis_assertion: A dog is trying to get a ball back for his master.