I'm referring to the SME term used in business scope. Where a SME is proven through some standardized way, that makes it impossible for someone not so vetted to have input. Amateur being someone who has interest and knowledge but doesn't meet the checklist to have an opinion.

Like http://www.opm.gov/FAQS/QA.aspx?fid=a6da6c2e-e1cb-4841-b72d-...