How do you define a Data Scientist?

On the Bright Blog, David Hardtke and Josh Barger have an interesting post on defining what a Data Scientist is:

To begin, what is a Data Scientist?  It depends who you ask.  Common (incorrect) definitions are:

1. A Hadoop expert.  To those hiring managers that are certain they need a Hadoop expert I submit @DevOps_Borat
2. A Machine Learning expert.  Every construction project does not need a hammer.
3. Kagglers

I define a Data Scientist as someone who knows just enough programming, system administration, and statistics to transform a large, possibly heterogeneous set of unstructured data into actionable intelligence or an actual product.  The Data Scientist must also have sufficient visualization and communication skills to be able to convince someone that they did it correctly.

Do you agree with this definition of a Data Scientist? It seems to focus mostly on skills, as opposed to function. So then, if this is the skill set for a Data Scientist, how would you define what they do?