Jokes also betray a certain uneasiness about the apparent contradictions that they reveal.  In this case, the uneasiness derives from a fundamental uncertainty about which of the two faces of science, natural philosophy or instrumentality, represents its true character.  Is science really about understanding the world, with instrumentality being a matter of fortuitous spin-offs?
Žerty též prozrazují jistou rozpačitost ze zjevných rozporů, jež odhalují.