If you mean submitting the same article with no changes then it won't value it as highly, but if they are on different sites (not the same article sites), then it will treat it differently to the same content on one domain several times.
For example, a home page's content might exist on a few URLs and the home page might be de-indexed because of the other page that is duplicating the same content (I think you had a similar issue recently, so I used the example in that way as you already understand it).