To "debunk" something means to:

The term "debunk" refers specifically to the act of exposing the falseness, exaggeration, or myth of a claim, belief, or idea. When one debunks something, they provide evidence or reasoning that shows it to be incorrect or misleading. This process often involves critical analysis and aims to clarify misconceptions, thereby providing a more accurate understanding of the subject in question.

In contrast, the other choices suggest actions contrary to debunking. For instance, reinforcing authenticity means affirming the validity of something, which is the opposite of unveiling falsehoods. Supporting claims also contradicts the notion of debunking, as it would imply agreement with the assertion rather than questioning it. Ignoring criticism implies a lack of engagement with the argument or evidence presented, which does not align with the investigative nature inherent in debunking. Thus, the essence of debunking lies in the critical dismantling of unfounded or erroneous claims.