Update User Research page “index” (#1203)

src/user-research/index.md

@@ -70,7 +70,7 @@ Our principles are not rules. They guide our work, keep us improving as a team,
 
    Researchers at dxw help clients build on the knowledge and data they already
    have. We combine existing knowledge, poorly understood data and new research
-   into a coherent picture.
+   into a coherent picture. We know how much it increases the credibility of our findings when we properly use and acknowledge previous work.
 
 8. **Accept and admit constraints**