http://dilbertblog.typepad.com/the_dilbert_blog/2007/07/care...
Think of it this way:
1. skill to know the problem that needs to be solved.
2. skill needed to solve the problem
Second skill isn't necessarily programming computers btw - could be leadership, persuasive writing, film making, etc.
http://dilbertblog.typepad.com/the_dilbert_blog/2007/07/care...