Zen students should not be attached to correct answers or incorrect answers by the patriarchs. We use kong-ans to perceive directly how to function correctly in everyday life. Yes, it is possible. Kong-ans are only one technique. Chinese people only use chopsticks.
Korean people use chopsticks and spoons.
Indian people only use their hands. But they all have a full stomach when they eat, no matter how they eat. If you make something, you have a problem. We use kong-ans to take away your opinion. When you take away your opinion, your mind is clear like space.