Leo: Premise: "A boy in a red vest and white karate outfit is sparring with a boy in a blue vest."
Hypothesis: "A boy is sparring with another boy at karate practice."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
A boy in a red vest sparring a boy in a blue vest is a boy sparring another boy.
Thus, the answer is yes.