Our series on the Discources by Machiavelli will continue in September.
RationalWiki defines a crank as:
someone who holds extremely unorthodox views on a subject and is often very vocal about these opinions. A crank will usually maintain their viewpoint despite, or perhaps because of, evidence to the contrary. The crank is usually an amateur in the field they are arguing against, but sometimes individuals with expertise in that field will become a ‘crank’