magic
magic not as an umbrella term for "the not-understood" but as a countervailing force to science and experimentation. magic as the thing that makes experiments return bogus results, that breaks sensors and gauges, that times the passing truck with the bird flying overhead to contaminate the sample. mages as intrinsically contrary to consensus reality, as madmen inflicting their delusions on the world, as liars and con artists pulling one over on us all.