Wikipedia:Abundance and redundancy

Abundance and redundancy deals with similar material being shared among separate articles, and debates over the removal of said materials on the basis of context: It is a preferred solution that material be included rather than excluded to resolve an edit war. In many cases, edit wars are based on a premise, that: "such material doesn't belong here, because it belongs in another article". Instead of removing content, it is preferred to have abundance and redundancy of content.