Premise: A guy and boy are riding on a skateboard together.

Hypothesis: The 2 guys are rollerblading around the park a few feet away from each other.
Relation: contradiction

Hypothesis: The 2 guys are daredevils riding down a steep hill togethor on a one-man skateboard.
Relation: neutral

Hypothesis: The 2 people could fall down on top of each other easily.
Relation: entailment