What a proof gap means

A proof gap means a claim is not yet supported clearly enough. The evidence may be missing, confidential, too general or unrelated to the outcome being considered.

What to check

• Is there a comparable example and a clear before-and-after result?
• Is the provider's own role in the work clear?
• Can confidential work be shown through an anonymised example or reference?
• Does the evidence fit the scale, system, sector or risk involved?

What to do next

Ask for the smallest useful evidence that would reduce uncertainty. A gap is not an automatic rejection, and a provider should explain limits rather than inventing proof.