Bell Mason Diagnostics
	By Gordon Bell DEC & Heidi Mason Regis McKenna    When you can measure what you are speaking about, and  express it in numbers, you know something about it: but when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science. -William Thompson, Lord Kelvin 1882-1907) Popular Lectures and Addresses, 1891-94