Less is More: The Dilution Effect Erodes Perceived Expertise

Professional value is often eroded not by a lack of skill, but by the psychological way evidence is processed. While it seems intuitive that adding credentials increases one's worth, the human brain rarely sums these traits; instead, it averages them. This is a manifestation of the Conjunction Fallacy: the statistical reality that a specific combination of traits—such as an "Expert Coder" who also performs "IT Support" and "Design"—is less probable than a single, focused trait. When a professional presents a sprawling array of disparate skills, they inadvertently provide "handles" for skeptics to grasp. If a critic finds a single flaw in a secondary skill, they often use that metric to dismiss the practitioner's primary expertise. This triggers a "Dilution Effect," where peripheral skills drag down the perceived authority, transforming a master of a craft into a mere generalist. Professional authority isn't additive; it's focused. Linda: Less is More