Professional Ketman is reasoned thus: since I find myself in circumstances over which I have no control, and since I have but one life and that is fleeting, I should strive to do my best. I am like a crustacean attached to a crag on the bottom of the sea. Over me storms rage and huge ships sail; but my entire effort is concentrated upon clinging to the rock, for otherwise I will be carried off by the waters and perish, leaving no trace behind.

Sceptical Ketman is widely disseminated throughout intellectual circles. One argues that humanity does not know how to handle its knowledge or how to resolve the problems of production and division of goods.