Three histories, one unlabelled file
A label records where a file came from, not whether it is true.
File 1
Had a content credential, a signed record of how it was made. The credential was stripped.
File 2
Generated text with a watermark. It was rewritten or translated, and the watermark's detection weakened.
File 3
From a provider that never marks its output. It never had a label.
All three now look the same: no label detected. A missing label shows nothing about how the work was made.