Also, how can an employee assert that a patent is not workable to the USPTO if, after some tweaking, the concept is found to work well? What if the employee told the USPTO, based on that first  preliminary review, that the device will not work, but then found out later that it works after all?  Go back to the USPTO and say: "Oops!, I made a mistake! The device works after all?"

Knixx...  My thoughts exactly