I am working on a website that has been publishing content for years. Some of the content is 6 or 7 years old! Daily, I am re-writing, updating, or deleting old content, and adding new content. We have covered every topic under the sun (within our niche market), and sometimes new content is similar to old content in some way. Or, we are answering the same question a dozen different ways. I have always assumed this was correct for SEO, but I was challenged on this notion today and now I am questioning the practice of writing content that could be the same (or similar) as the old content we have written. What are the pros and content of creating "duplicate" content, provided it is never an exact carbon copy of our older content.