R1:3438664b3857

Provide documentation explicitly describing what a "root problem" is

Summary:
A guide to basic skills every software professional should have.

This is so fundamental that I don't think the document is actually helpful, but we can try it I guess.

Test Plan: Reading?

Reviewers: chad

Reviewed By: chad

Subscribers: Shredder121

Differential Revision: https://secure.phabricator.com/D14707