Student: Premise: "A man and a woman are riding bikes on a street."
Hypothesis: "The couple is riding to the supermarket."
Do we know that the hypothesis entailed by the premise?.
Teacher: Let's think:
A man and a woman does not necessarily imply they are couple and the fact that they are riding bikes on a street does not necessarily mean that they are riding to the supermarket. So the final answer is it is not possible to tell.