An OTDR screenshot hides unsafe inspection and weak evidence

A fictional training group receives an OTDR screenshot showing a reflective event and a directional apparent gain at a different location. A learner calls both features definitive proof of one failed connector and proposes looking directly into the fiber with a handheld microscope to confirm it. The actual optical condition has not been verified, and scraps from earlier cleaving remain on the bench near an open drink. The instructor must separate measurement interpretation from safe inspection and housekeeping. This written case uses only described evidence and performs no optical inspection. Explain which immediate boundaries matter and how corroborating measurement conditions can prevent an unsupported defect diagnosis.