Why does evaluating sources fail?

The most common reason evaluating sources fails: Evaluating schemas by how they feel rather than where they came from. A schema delivered with confidence, narrative polish, and emotional resonance will feel more true than one delivered with caveats and uncertainty — even when the cautious version is far more reliable. The failure is letting delivery quality substitute for source quality.

The fix: Pick five schemas you currently operate on — beliefs about your career, your health, your relationships, your productivity, your identity. For each one, write down where you acquired it: a specific person, a book, a cultural norm, direct experience, or unknown. Then rate each source on three dimensions: (1) does the source have direct experience in this domain? (2) does the source have incentives that might distort their claim? (3) have you verified this schema against any independent source? You will likely find that your most confidently held beliefs have the least-examined origins.

The underlying principle is straightforward: Not all sources of schemas are equally reliable — evaluate where your models come from.