Artists

From a post on slashdot

The fact is that any artist is a giant milling machine - in goes ideas and concepts and styles and techniques and disparate things (like banana cereal and dogs peeing against trees) and they all churn and ferment and process and grind and beak down and clump together and then

... ping ... up pops an idea, which because the milling machine is an artist of some description, needs to get expressed in some manner (the non-artist merely stalls at the last step - the process is not unique to artists).

Pretty much sums it up....