To "Debunk" something means to:

To "debunk" something means to expose the falseness of that thing or person. This term is often used in contexts where myths, misconceptions, or fraudulent claims are being challenged. When one debunks a statement or belief, they provide evidence or argumentation that reveals it to be untrue or misleading, thereby stripping it of any authority or credibility it may have held.

In this sense, the act of debunking is critical for promoting truth, especially in fields like science, journalism, or history, where misinformation can easily spread. This understanding clarifies why the other choices do not align with the meaning of "debunk": they suggest validation, reinforcement, or concealment, which are opposite actions to exposing or discrediting falsehoods.