Student: Premise: "A teenager playing with a younger child."
Hypothesis: "A brothers teaches his younger sibling how to skate."
Do we know that the hypothesis entailed by the premise?.
Teacher: Let's think:
A teenager with a younger child are not necessarily a brother and his younger sibling. A teenager playing with a younger child is not necessarily teaching the child how to skate. So the final answer is it is not possible to tell.