If somebody tells the truth, there are three things that need to be corrected. The first one cannot be corrected because he has told the truth. In Sanskrit, nasat, nasat means that which is. Asat Means that which is not. Is there anything in between which is neither is nor is not? Yes. What needs to be corrected is something that is neither real nor unreal. It's like being silent. If something is not there at all, there's no need to talk about it,. No need to do philosophy or advice about it. A lie needs to be correcting by the truth. But a mirage water can't be corrected as we didn't see it.