ABSTRACT
The essence of every scientific enterprise is the ability to reliably and validly measure the object of interest. Lord Kelvin (Strauss, 1968, 482b), in the 19th century, expressed this view: “When you cannot measure it, when you cannot express it in numbers,… you have scarcely in your thoughts, advanced to the stage of science, whatever the matter may be.” Martin Fischer (Strauss, 1968, 482b) expressed a similar sentiment in the 20th century: “Quibbling over qualitative differences is always an evidence of sophistry. Vital distinctions are always quantitative.”
