context: Some men and boys are playing with a Frisbee in a grassy area.
hypothesis: It is improbable that a group of people play a competitive game of Frisbee.
valid_hypothesis: There is a very good chance that a group of people play a competitive game of Frisbee.
invalid_hypothesis: It is improbable that a group of people play a competitive game of Frisbee.
hypothesis_assertion: A group of people play a competitive game of Frisbee.