When a Devisor builds something, it is a Devise, irreproducible, scorned by Science. When a Gadgeteer builds something, it's reproducible and patentable. Then there are those who are both, and know not what they have created. For those, there is the Devise Test. The concept is simple: gather together all the notes the inventor produced while working on the project, hand them to a non-devisor, and see if they can build it. It's rarely that simple, though; notes... are sometimes sketchy, concepts not spelled out, steps glossed over. Not to mention hard to read.