Role-play is useful in that the candidate is telling you how they would act in a situation, which is how they think people should behave professionally. If they are making that up, then they would likely fabricate past situations as well.
I don't agree that it is easy to tell when someone is fabricating, if that someone is a proficient liar then it will be impossible, and that is the exact type of person you want to exclude from further consideration.
I don't agree that it is easy to tell when someone is fabricating, if that someone is a proficient liar then it will be impossible, and that is the exact type of person you want to exclude from further consideration.