The measured difference in corroboration signal strength between you and your competitors — the primary determinant of retrieval preference. A positive gap (you have more tier-1/2 sources than competitors) produces retrieval advantage; a negative gap produces attribution displacement. The competitive corroboration gap is measured per-claim: for each core attribute you want cited, count your tier-1/2 sources and your top 3 competitors’ tier-1/2 sources. The gap determines whether you are cited preferentially, competitively, or displaced. Closing competitive corroboration gaps is the tactical objective of corroboration campaigns.