Update reduce-duplication.md

Tabular format for questions.

Author: rrrutledge

measuring/goals/reduce-duplication.md

@@ -1,9 +1,11 @@
-# **Goal::** Reduce duplication
+# **Goal:** Reduce duplication
 
 Why should be build things more than once?
 We're already busy and behind where we'd like to be.
 We want to build just once software that solves commmon problems and then share it widely throughout the company.
 
-## Questions
+## Related Questions
 
-* [Who uses the InnerSource project?](../questions/who-uses.md)
+| **Question** | **How it relates to the goal** | **Limitations or gotchas** |
+| --- | --- | --- |
+| [Who uses the InnerSource project?](../questions/who-uses.md) | Every instance of reduced duplication will show up as an increase in usage. | The converse is not necessarily true that every instance of increased usage is an instance of reduced duplication.  It's always possible that some shared usage would have happened even without InnerSource. |