Silas Plum challenges the idea of objective vs subjective value. He believes strongly in the tired old maxim that the true value of an object is more than the sum of its parts, that the gut is a truth-teller, and that the Aristotelian notion of learning-by-doing is the best teacher around. Judge his worth at silasplum.com, on Twitter at @silasplum, and Instagram at @silasplumart.