Remember when Disco. spinner Casey Luskin rolled out this silly attempt at refuting critics of irreducible complexity?:
Car engines use various kinds of bolts, and a bolt could be seen as a small âsub-partâ or âsub-systemâ of a car engine. Under [Ken] Miller's logic, if a vital bolt in my car's engine might also to perform some other functionâperhaps as a lugnut--then it follows that my car's whole engine system is not irreducibly complex. Such an argument is obviously fallacious.
He wrote that in April of 2006. Little did I know at the time that the Department of Homeland Security had issued a document in March of that year which could have clarified matters. In What Every Member of the Trade Community Should Know About: Distinguishing Bolts from Screws, DHS advises importers and customs agents about the proper way to categorize threaded metal for purposes of tariffs. As a matter of definition, DHS explains:
<blockquote>A bolt is an externally threaded fastener designed for insertion through the holes in assembled parts, and is normally intended to be tightened or released by torquing a nut.</blockquote>
If a bolt were also a lugnut, it would be very confusing.
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In the terminology of mechanics (using the broad sense, which includes, e.g., electricians & plumbers), bolts are "male" and nuts are "female".
By implying the two are interchangeable, Comrade Luskin reveals not only his dire ignorance of topology, but also a degree of, um, flexibility that may not sit well with his (or her?) hyperchristian colleagues.