"It also requires a fundamental rethinking of what a laser is: not restricted to the current kinds of devices, but any device which turns inputs with little coherence into an output of very high coherence."
All signs refer directly to abstractions in the mind that can be compiled into a variety of useful forms. Yours does not take precedent in this case, as it is plain to see that sigma is under specified due to the huge range of concepts it’s practical usage covers. Your attempt to prescribe that which should be prescribed is nothing but authoritarianism.