Start with the visible
A photograph can support “a dark line is visible near the flange edge.” It cannot, by itself, establish crack depth, material history or whether a component meets its specification.
Keep inference conditional
A visual-language model might suggest several explanations for the same line. Lighting, residue, a machining mark and a defect may be difficult to distinguish. The product should preserve this ambiguity rather than converting fluent language into false certainty.
Make the missing evidence actionable
“Request a second angle with a scale reference” is more useful than an unsupported pass/fail verdict. Review records should expose what another person needs to resolve the question.
Authority is a separate field
A proposed observation is not an instruction to replace a part or halt production. Qualified personnel and established procedures govern those actions. Our browser prototype demonstrates the handoff, not validated automated inspection.