Do we say that it is not permissible to challenge lineage, even if clear evidence is presented to that effect?

The questioner : Shaykh, regarding the issue of challenging lineage, if we receive, for example, a report of certainty, or let us say, clear evidence, do we say that it is still not permissible, or what?

The Shaykh : No, it is not permissible. The previous statement was based on hearsay and rumor.
The student : Based on hearsay and rumor, yes. But if there is evidence and witnesses here, meaning there is no flaw in them.